Common use of PRELIMINARY STATEMENT Clause in Contracts

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) the Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class M-11 Certificate, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xvix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Accounts, any Subsequent Mortgage Loan Interest, the Net WAC Rate Carryover Reserve Account, any Servicer Prepayment Charge Payment Amounts, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) LT1 Variable(2) $ 509,694,907.11 February 2037 LT1PF Variable(2) $ 185,365,645.51 February 2037 LT2 Variable(2) $ 590,304,841.03 February 2037 LT2PF Variable(2) $ 214,634,606.35 February 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class C Certificates, (xvii) the Class P Certificates, (xviii) the Class R Certificates and (xix) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Accounts, the Interest Coverage Accounts, any Subsequent Mortgage Loan Interest, the Net WAC Rate Carryover Reserve Account, the Cap Allocation Agreement, the Cap Account, the Interest Rate Swap Agreement, the Swap Acount, the Supplemental Interest Trust, any Servicer Prepayment Charge Payment Amounts, the Basis Risk Cap Agreement and the Interest Rate Cap Contract) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I-LT1 Variable(2 ) $ 444,210,719.25 February 25, 2037 I-LT1PF Variable(2 ) $ 229,839,482.91 February 25, 2▇▇▇ ▇-▇▇▇ Variable(2 ) $ 618,617,188.27 February 25, 2037 I-LT2PF Variable(2 ) $ 337,068,542.52 February 25, 2▇▇▇ ▇-▇▇▇ Variable(2 ) $ 100.00 February 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of seventeen classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) the Class II-A-3 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class C Certificates, (xv) the Class P Certificates, (xvi) the Class R Certificates and (xvii) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, any Servicer Prepayment Charge Payment Amounts, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 43,200,091.53 March 25, 2037 II Variable(2) $ 8,046,584.07 March 25, 2037 I-1-B Variable(2) $ 4,917,437.46 March 25, 2037 I-3-B Variable(2) $ 6,683,617.74 March 25, 2037 I-4-B Variable(2) $ 7,559,243.48 March 25, 2037 I-5-B Variable(2) $ 8,395,396.74 March 25, 2037 I-6-B Variable(2) $ 9,199,397.74 March 25, 2037 I-7-B Variable(2) $ 9,765,853.13 March 25, 2037 I-8-B Variable(2) $ 9,968,153.03 March 25, 2037 I-10-B Variable(2) $ 9,671,900.88 March 25, 2037 I-11-A Variable(2) $ 9,378,402.50 March 25, 2037 I-11-B Variable(2) $ 9,378,402.50 March 25, 2037 I-12-B Variable(2) $ 9,082,472.90 March 25, 2037 I-13-A Variable(2) $ 8,793,313.47 March 25, 2037 I-13-B Variable(2) $ 8,793,313.47 March 25, 2037 I-14-B Variable(2) $ 8,533,905.53 March 25, 2037 I-15-B Variable(2) $ 8,285,929.66 March 25, 2037 I-16-B Variable(2) $ 8,049,176.19 March 25, 2037 I-17-B Variable(2) $ 7,905,614.92 March 25, 2037 I-18-A Variable(2) $ 9,624,741.95 March 25, 2037 I-18-B Variable(2) $ 9,624,741.95 March 25, 2037 I-19-B Variable(2) $ 12,780,615.97 March 25, 2037 I-20-B Variable(2) $ 14,847,514.92 March 25, 2037 I-21-B Variable(2) $ 15,023,940.84 March 25, 2037 I-25-B Variable(2) $ 6,627,023.32 March 25, 2037 I-26-B Variable(2) $ 5,824,803.04 March 25, 2037 I-27-A Variable(2) $ 5,611,916.17 March 25, 2037 I-27-B Variable(2) $ 5,611,916.17 March 25, 2037 I-28-B Variable(2) $ 5,412,683.97 March 25, 2037 I-29-A Variable(2) $ 5,220,542.54 March 25, 2037 I-29-B Variable(2) $ 5,220,542.54 March 25, 2037 I-30-B Variable(2) $ 5,035,198.16 March 25, 2037 I-31-B Variable(2) $ 4,856,379.46 March 25, 2037 I-32-A Variable(2) $ 4,683,802.84 March 25, 2037 I-32-B Variable(2) $ 4,683,802.84 March 25, 2037 I-33-B Variable(2) $ 4,517,323.52 March 25, 2037 I-34-B Variable(2) $ 4,356,848.75 March 25, 2037 I-35-B Variable(2) $ 4,202,131.89 March 25, 2037 I-36-B Variable(2) $ 1,159,238.77 March 25, 2037 I-38-A Variable(2) $ 3,128,307.81 March 25, 2037 I-38-B Variable(2) $ 3,128,307.81 March 25, 2037 I-39-A Variable(2) $ 3,017,211.50 March 25, 2037 I-39-B Variable(2) $ 3,017,211.50 March 25, 2037 I-40-A Variable(2) $ 2,910,042.28 March 25, 2037 I-40-B Variable(2) $ 2,910,042.28 March 25, 2037 I-41-B Variable(2) $ 2,806,668.77 March 25, 2037 I-42-B Variable(2) $ 2,706,936.27 March 25, 2037 I-43-B Variable(2) $ 2,610,787.79 March 25, 2037 I-44-A Variable(2) $ 2,518,012.45 March 25, 2037 I-44-B Variable(2) $ 2,518,012.45 March 25, 2037 I-45-B Variable(2) $ 2,428,525.11 March 25, 2037 I-47-A Variable(2) $ 2,258,959.29 March 25, 2037 I-47-B Variable(2) $ 2,258,959.29 March 25, 2037 I-48-A Variable(2) $ 2,178,658.48 March 25, 2037 I-48-B Variable(2) $ 2,178,658.48 March 25, 2037 I-49-B Variable(2) $ 2,101,207.67 March 25, 2037 I-50-A Variable(2) $ 2,026,503.61 March 25, 2037 I-50-B Variable(2) $ 2,026,503.61 March 25, 2037 I-51-B Variable(2) $ 1,954,465.65 March 25, 2037 I-52-A Variable(2) $ 1,884,999.52 March 25, 2037 I-52-B Variable(2) $ 1,884,999.52 March 25, 2037 I-53-B Variable(2) $ 1,818,610.34 March 25, 2037 I-54-B Variable(2) $ 1,755,199.05 March 25, 2037 I-55-B Variable(2) $ 1,694,238.85 March 25, 2037 I-57-B Variable(2) $ 1,576,171.65 March 25, 2037 I-58-B Variable(2) $ 1,520,001.97 March 25, 2037 I-59-B Variable(2) $ 1,465,820.83 March 25, 2037 I-60-A Variable(2) $ 1,413,535.84 March 25, 2037 I-60-B Variable(2) $ 1,413,535.84 March 25, 2037 I-61-B Variable(2) $ 1,363,114.00 March 25, 2037 I-62-A Variable(2) $ 1,314,509.59 March 25, 2037 I-62-B Variable(2) $ 1,314,509.59 March 25, 2037 I-63-A Variable(2) $ 35,403,831.08 March 25, 2037 I-63-B Variable(2) $ 35,403,831.08 March 25, 2037

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class A-1A Certificates, (ii) the Class A-1F1 Certificates, (iii) the Class A-1F2 Certificates, (iv) the Class A-2A Certificates, (v) the Class A-2F Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class B-1 Certificates, (xvi) the Class P Certificates, (xvii) the Class X-1 Certificates, (xviii) the Class X-2 Certificates, (xix) the Class X-S Certificates, (xx) the Class A-R Certificates and (xxi) the Class A-RL Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Account, Basis Risk Reserve Fund, Swap Account, the Capitalized Interest Account, the Supplemental Interest Trust and the Subsequent Mortgage Loan Interest) as a REMIC real estate mortgage investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class A-RL Certificates will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated “regular interests” in REMIC I 1 (the “REMIC 1 Regular Interests”). None of the REMIC 1 Regular Interests will be certificated. The latest possible maturity date (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely determined for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.Section

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-AR1, DSLA Mortgage Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of fifteen classes of certificates, designated as (i) the Class A-1A Certificates, (ii) the Class A-1B Certificates, (iii) the Class A-2A Certificates, (iv) the Class A-2B Certificates, (v) the Class X-1 Certificates, (vi) the Class X-2, (vii) the Class A-R Certificate, (viii) the Class B-1 Certificates, (ix) the Class B-2 Certificates, (x) the Class B-3 Certificates, (xi) the Class B-4 Certificates, (xii) the Class B-5 Certificates, (xiii) the Class B-6 Certificates and (xiv) the Class Y Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, the Class A-1A, Class ▇-▇▇, ▇▇▇▇▇ ▇-▇▇, ▇▇▇▇▇ ▇-▇▇, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5, and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class X-2 Certificates beneficially own the Basis Risk Reserve Fund. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, and the interests in any REMIC formed hereby. The Upper Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC regular interest. The Class Y Certificates, which will not have a Class Principal Balance and will not accrue interest, will only be entitled to received on any Distribution Date the excess, if any, of (i) amounts received pursuant to the Yield Maintenance Agreements for that Distribution date over (ii) the portion thereof payable to the Class A-1A, Class A-1B, Class A-2A and Class A-2B Certificates on that Distribution Date. The Class Y Certificates will not bear represent an interest or have a principal amountin any REMIC. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial Class Principal Amount for each Class of Lower-Through Tier REMIC Interest: Class Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Corresponding Class of Certificates LTA-1A (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 77,399,000.00 Class A-1A LTA-1B (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 8,600,000.00 Class ▇-▇▇ ▇▇▇-▇▇ (other than the Underlying 1) $ 98,225,000.00 Class A-2A LTA-2B (1) $ 27,027,000.00 Class A-2B LTA-R (1) $ 25.00 Class A-R LTB-6 (1) $ 920,250.87 Class B-6 LT-Group V Certificates1 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 93,178,214.71 N/A LT-SC-1 (2) $ 299,133.95 N/A LT-Group 2 (3) $ 135,708,010.12 N/A LT-SC-2 (3) $ 435,667.09 N/A LTQ (1) $ 459,242,051.75 N/A LT-R (4) (4) Class A-R __________________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) and the Cap Agreements (as hereinafter defined) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8HE4, Class IAsset Backed Pass-A-1Through Certificates (the “Certificates”). The Certificates will consist of nineteen classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Class ISeries 2006-A-2HE4, Class IIAsset Backed Pass-A-1Through Certificates, Class II-A-2dated as of September 1, Cl2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, ▇▇▇▇▇ ▇▇▇-A-1Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Ocwen Loan Servicing, LLC as servicer (the “Servicer”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1 Certificates (the “Class A-1 Certificates”), Class III-A-2A-2A, Class IV-A-1A-2B, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 A-2C and Class R A-2D Certificates representing in (collectively, the aggregate “Class A-2 Certificates”; together with the entire beneficial ownership Class A-1 Certificates, the Trust (as defined herein“Class A Certificates”), the primary assets of which are the Underlying Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9 and Class M-10 Certificates (collectively, the “Publicly Offered Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as defined hereinof June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated September 25, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. The Depositor intends to Purchaser will sell some or all of the Class M-11 Certificates (the “Class M-11 Certificates. REMIC I As provided herein”; together with the Publicly Offered Mezzanine Certificates, the Trustee will elect “Mezzanine Certificates”) to treat DBSI pursuant to the segregated pool Purchase Agreement dated as of assets contained September 25, 2006 between the Purchaser and DBSI. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountPooling and Servicing Agreement. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (parties hereto agree as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which Certificates in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of eight classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class M Certificates, (v) the Class B Certificates, (vi) the Class C Certificates, (vii) the Class P Certificates and (viii) the Class R Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (exclusive of the Excess Reserve Fund Account and the other than assets identified as excluded in accordance with the Underlying Group V Certificatesdefinition of “REMIC 1” herein) as a REMIC real estate mortgage investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest represents the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) LT1AA Variable(2) $ 165,478,105.44 April 25, 2012 LT1A1 Variable(2) $ 968,290.00 April 25, 2012 LT1A2 Variable(2) $ 490,450.00 April 25, 2012 LT1A3 Variable(2) $ 207,860.00 April 25, 2012 LT1M Variable(2) $ 7,590.00 April 25, 2012 LT1B Variable(2) $ 14,362.09 April 25, 2012 LT1ZZ Variable(2) $ 1,688,552.10 April 25, 2012 LT1P Variable(2) $ 100.00 April 25, 2012 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class A1-A Certificates, (ii) the Class A1-B Certificates, (iii) the Class A1-C Certificates, (iv) the Class AM Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class B Certificates, (xiv) the Class C Certificates, (xv) the Class P Certificates and (xvi) the Class R Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets (other than the Underlying Group V CertificatesNet WAC Shortfall Reserve Fund, any Master Servicer Prepayment Charge Payment Amounts, the Pre-Funding Account, the Interest Coverage Account, the Class M Interest Reserve Fund and, for the avoidance of doubt, the Supplemental Interest Trust, the Derivative Account, the Cap Contracts, the Collateral Account and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of Residual Interests in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-1-A Variable(2) $ 1,291,504.09 September 25, 2037 1-1-B Variable(2) $ 1,291,504.09 September 25, 2037 1-2-A Variable(2) $ 2,392,637.16 September 25, 2037 1-2-B Variable(2) $ 2,392,637.16 September 25, 2037 1-3-A Variable(2) $ 3,515,987.98 September 25, 2037 1-3-B Variable(2) $ 3,515,987.98 September 25, 2037 1-4-A Variable(2) $ 4,652,077.16 September 25, 2037 1-4-B Variable(2) $ 4,652,077.16 September 25, 2037 1-5-A Variable(2) $ 5,790,398.31 September 25, 2037 1-5-B Variable(2) $ 5,790,398.31 September 25, 2037 1-6-A Variable(2) $ 6,916,224.67 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-6-B Variable(2) $ 6,916,224.67 September 25, 2037 1-7-A Variable(2) $ 8,020,326.33 September 25, 2037 1-7-B Variable(2) $ 8,020,326.33 September 25, 2037 1-8-A Variable(2) $ 9,083,173.44 September 25, 2037 1-8-B Variable(2) $ 9,083,173.44 September 25, 2037 1-9-A Variable(2) $ 10,058,672.05 September 25, 2037 1-9-B Variable(2) $ 10,058,672.05 September 25, 2037 1-10-A Variable(2) $ 10,765,542.83 September 25, 2037 1-10-B Variable(2) $ 10,765,542.83 September 25, 2037 1-11-A Variable(2) $ 11,463,933.03 September 25, 2037 1-11-B Variable(2) $ 11,463,933.03 September 25, 2037 1-12-A Variable(2) $ 11,644,488.25 September 25, 2037 1-12-B Variable(2) $ 11,644,488.25 September 25, 2037 1-13-A Variable(2) $ 11,067,336.89 September 25, 2037 1-13-B Variable(2) $ 11,067,336.89 September 25, 2037 1-14-A Variable(2) $ 10,518,483.57 September 25, 2037 1-14-B Variable(2) $ 10,518,483.57 September 25, 2037 1-15-A Variable(2) $ 9,996,426.10 September 25, 2037 1-15-B Variable(2) $ 9,996,426.10 September 25, 2037 1-16-A Variable(2) $ 9,499,998.27 September 25, 2037 1-16-B Variable(2) $ 9,499,998.27 September 25, 2037 1-17-A Variable(2) $ 9,027,876.59 September 25, 2037 1-17-B Variable(2) $ 9,027,876.59 September 25, 2037 1-18-A Variable(2) $ 8,578,837.10 September 25, 2037 1-18-B Variable(2) $ 8,578,837.10 September 25, 2037 1-19-A Variable(2) $ 8,151,847.46 September 25, 2037 1-19-B Variable(2) $ 8,151,847.46 September 25, 2037 1-20-A Variable(2) $ 7,798,892.21 September 25, 2037 1-20-B Variable(2) $ 7,798,892.21 September 25, 2037 1-21-A Variable(2) $ 7,396,029.40 September 25, 2037 1-21-B Variable(2) $ 7,396,029.40 September 25, 2037 1-22-A Variable(2) $ 7,016,763.42 September 25, 2037 1-22-B Variable(2) $ 7,016,763.42 September 25, 2037 1-23-A Variable(2) $ 6,425,008.72 September 25, 2037 1-23-B Variable(2) $ 6,425,008.72 September 25, 2037 1-24-A Variable(2) $ 3,611,587.50 September 25, 2037 1-24-B Variable(2) $ 3,611,587.50 September 25, 2037 1-25-A Variable(2) $ 3,502,440.00 September 25, 2037 1-25-B Variable(2) $ 3,502,440.00 September 25, 2037 1-26-A Variable(2) $ 3,396,127.50 September 25, 2037 1-26-B Variable(2) $ 3,396,127.50 September 25, 2037 1-27-A Variable(2) $ 3,293,460.00 September 25, 2037 1-27-B Variable(2) $ 3,293,460.00 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-28-A Variable(2) $ 3,193,627.50 September 25, 2037 1-28-B Variable(2) $ 3,193,627.50 September 25, 2037 1-29-A Variable(2) $ 3,096,832.50 September 25, 2037 1-29-B Variable(2) $ 3,096,832.50 September 25, 2037 1-30-A Variable(2) $ 3,003,075.00 September 25, 2037 1-30-B Variable(2) $ 3,003,075.00 September 25, 2037 1-31-A Variable(2) $ 2,911,950.00 September 25, 2037 1-31-B Variable(2) $ 2,911,950.00 September 25, 2037 1-32-A Variable(2) $ 2,823,862.50 September 25, 2037 1-32-B Variable(2) $ 2,823,862.50 September 25, 2037 1-33-A Variable(2) $ 2,738,205.00 September 25, 2037 1-33-B Variable(2) $ 2,738,205.00 September 25, 2037 1-34-A Variable(2) $ 2,654,977.50 September 25, 2037 1-34-B Variable(2) $ 2,654,977.50 September 25, 2037 1-35-A Variable(2) $ 2,574,585.00 September 25, 2037 1-35-B Variable(2) $ 2,574,585.00 September 25, 2037 1-36-A Variable(2) $ 20,079,787.50 September 25, 2037 1-36-B Variable(2) $ 20,079,787.50 September 25, 2037 1-37-A Variable(2) $ 1,882,755.00 September 25, 2037 1-37-B Variable(2) $ 1,882,755.00 September 25, 2037 1-38-A Variable(2) $ 1,825,582.50 September 25, 2037 1-38-B Variable(2) $ 1,825,582.50 September 25, 2037 1-39-A Variable(2) $ 1,770,300.00 September 25, 2037 1-39-B Variable(2) $ 1,770,300.00 September 25, 2037 1-40-A Variable(2) $ 1,716,435.00 September 25, 2037 1-40-B Variable(2) $ 1,716,435.00 September 25, 2037 1-41-A Variable(2) $ 1,664,460.00 September 25, 2037 1-41-B Variable(2) $ 1,664,460.00 September 25, 2037 1-42-A Variable(2) $ 1,613,745.00 September 25, 2037 1-42-B Variable(2) $ 1,613,745.00 September 25, 2037 1-43-A Variable(2) $ 1,564,762.50 September 25, 2037 1-43-B Variable(2) $ 1,564,762.50 September 25, 2037 1-44-A Variable(2) $ 1,517,355.00 September 25, 2037 1-44-B Variable(2) $ 1,517,355.00 September 25, 2037 1-45-A Variable(2) $ 1,471,050.00 September 25, 2037 1-45-B Variable(2) $ 1,471,050.00 September 25, 2037 1-46-A Variable(2) $ 1,426,477.50 September 25, 2037 1-46-B Variable(2) $ 1,426,477.50 September 25, 2037 1-47-A Variable(2) $ 1,383,007.50 September 25, 2037 1-47-B Variable(2) $ 1,383,007.50 September 25, 2037 1-48-A Variable(2) $ 1,341,112.50 September 25, 2037 1-48-B Variable(2) $ 1,341,112.50 September 25, 2037 1-49-A Variable(2) $ 1,300,162.50 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-49-B Variable(2) $ 1,300,162.50 September 25, 2037 1-50-A Variable(2) $ 1,260,630.00 September 25, 2037 1-50-B Variable(2) $ 1,260,630.00 September 25, 2037 1-51-A Variable(2) $ 1,222,357.50 September 25, 2037 1-51-B Variable(2) $ 1,222,357.50 September 25, 2037 1-52-A Variable(2) $ 1,185,030.00 September 25, 2037 1-52-B Variable(2) $ 1,185,030.00 September 25, 2037 1-53-A Variable(2) $ 1,148,962.50 September 25, 2037 1-53-B Variable(2) $ 1,148,962.50 September 25, 2037 1-54-A Variable(2) $ 1,113,997.50 September 25, 2037 1-54-B Variable(2) $ 1,113,997.50 September 25, 2037 1-55-A Variable(2) $ 1,080,135.00 September 25, 2037 1-55-B Variable(2) $ 1,080,135.00 September 25, 2037 1-56-A Variable(2) $ 1,047,217.50 September 25, 2037 1-56-B Variable(2) $ 1,047,217.50 September 25, 2037 1-57-A Variable(2) $ 1,015,245.00 September 25, 2037 1-57-B Variable(2) $ 1,015,245.00 September 25, 2037 1-58-A Variable(2) $ 984,375.00 September 25, 2037 1-58-B Variable(2) $ 984,375.00 September 25, 2037 1-59-A Variable(2) $ 954,292.50 September 25, 2037 1-59-B Variable(2) $ 954,292.50 September 25, 2037 1-60-A Variable(2) $ 30,051,630.00 September 25, 2037 1-60-B Variable(2) $ 30,051,630.00 September 25, 2037 P Variable(2) $ 100.00 September 25, 2037 OC Variable(2) $ 196,613,419.09 September 25, 2037 ________________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-two classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) the Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8A Certificates, (xiv) the Class M-8B Certificates, (xv) the Class M-9 Certificates, (xvi) the Class M-10 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R-X Certificates and (xxi) the Class X Certificates, (xxi) the Class X Certificates, (xxii) the Class FL Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Basis Risk Cap Agreement, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, any Servicer Prepayment Charge Payment Amounts, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) ________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8CW1, Class IAsset Backed Pass-A-1Through Certificates (the “Certificates”). The Certificates will consist of nineteen classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Class ISeries 2▇▇▇-A-2▇▇▇, Class II-A-1, Class II-A-2, Cl▇▇▇▇▇ Backed Pass-Through Certificates, dated as of July 1, 2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, W▇▇▇-A-1▇ Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1 Certificates , Class III-A-2A-2A, Class IV-A-1A-2B, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 A-2C and Class R A-2D Certificates representing in (collectively, the aggregate the entire beneficial ownership the Trust (as defined herein“Class A Certificates”), the primary assets of which are the Underlying Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8 and Class M-9 Certificates (collectively, the “Public Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as defined hereinof June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated July19, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. The Depositor intends Purchaser will sell the Class M-10 and M-11 Certificates to sell some or all DBSI pursuant to the Purchase Agreement dated as of July 19, 2006 between Purchaser and DBSI. Capitalized terms used but not defined herein shall have the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained meanings set forth in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountPooling and Servicing Agreement. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (parties hereto agree as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-two classes of certificates, designated as (i) the Class AV-1 Certificates, (ii) the Class AV-2 Certificates, (iii) the Class AV-3 Certificates, (iv) the Class AF-1 Certificates, (v) the Class AF-2 Certificates, (vi) Class AF-3 Certificates, (vii) the Class AF-4 Certificates, (viii) the Class AF-5 Certificates, (ix) the Class AF-6 Certificates, (x) the Class M-1 Certificates (xi) the Class M-2 Certificates, (xii) the Class M-3 Certificates, (xiii) the Class M-4 Certificates, (xiv) the Class M-5 Certificates, (xv) the Class M-6 Certificates, (xvii) the Class M-7 Certificates, (xviii) the Class M-8 Certificates, (xix) the Class M-9 Certificates, (xx) the Class C Certificates, (xxi) the Class P Certificates and (xxii) the Class R Certificates. REMIC I As provided herein, the Trustee will Securities Administrator shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesBasis Risk Reserve Account, the Interest Rate Swap Agreement, the Swap Account, the Supplemental Interest Trust and any Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the Uncertificated REMIC I 1 Regular Interests.Interests shall be certificated. _______________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of ten classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class A-5 Certificates, (vi) the Class A-6 Certificates, (vii) the Class A-7 Certificates, (viii) the Class A-8 Certificates, (ix) the Class P Certificates and (x) the Class R Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Accounts and the Interest Coverage Accounts) as a REMIC real estate mortgage investment conduit (a "REMIC") for federal income tax purposes, and such segregated pool of assets will be designated as "REMIC I". For purposes of the REMIC Provisions, Component I." The Class R-I of the Class R Certificates Interest will represent ownership of the sole class of "residual interests" in REMIC I. Component I for purposes of the Class R Certificates will not bear interest or have a principal amountREMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC I Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.. None of the REMIC I Regular Interests will be certificated. Uncertificated REMIC I Initial Uncertificated Assumed Final Designation Pass-Through Rate Principal Balance Maturity Date (1) ----------- ----------------- ----------------- ----------------- I-LT1 Variable(2) $211,312,141.10 May 25, 2029 I-LT2 V▇▇▇▇▇▇▇(▇) $23,479,137.90 May 25, 2029 II-LT1 Variable(2) $34,589,884.50 May 25, 2029 II-LT2 Variable (2) $3,843,320.50 May 25, 2029 III-LT1 Variable (2) $87,025,909.50 May 25, 2029 III-LT2 Variable (2) $9,669,545.50 May 25, 2029 Class P N/A $100.00 May 25, 2029

PRELIMINARY STATEMENT. The This Agreement, dated and effective as of October 1, 2000, amends and restates the Pooling and Servicing Agreement, dated as of October 1, 2000 Banc of America Commercial Mortgage Inc., as Depositor, Bank of America, N.A., as Mortgage Loan Seller, HVB Realty Capital Inc., as Mortgage Loan Seller, ORIX Real Estate Capital Markets, LLC, as Master Servicer, Lennar Partners, Inc., as Special Servicer, and ▇▇▇▇▇ Fargo Bank Minnesota, N.A., as Trustee on behalf and as REMIC Administrator (the "Original Pooling Agreement"). This Agreement is being executed at the direction of the Trust will execute and deliver holders of Certificates entitled to 100% of the Bear Stearns Structured Products Inc. Trust, Series 2007-R8Voting Rights allocated to the Class A-1 Certificates, Class IA-2 Certificates, Class B Certificates, Class C Certificates, Class D Certificates, Class E Certificates, Class F Certificates, Class G Certificates and Class X Certificates, as issued under the Original Pooling Agreement (the "Original Certificates"), and with the agreement of all of the parties hereto, for the purpose of (i) resetting the principal balance and/or the pass-through rates to the Class A-1, Class I-A-2, Class IIX, Class B, Class C, Class D, Class E, Class F, Class G and Class X Certificates, (ii) making, in connection with such restructuring, two additional REMIC elections with respect to the Trust Fund and (iii) providing for the book-entry registration of the newly created Classes of Certificates. For the avoidance of doubt, it is noted that the first Distribution Date on the New Certificates hereunder shall be the Distribution Date in November 2000, and the changes made hereby are effective in respect of such Distribution Date for the full related Interest Accrual Period that began October 1, 2000. The Depositor issued the Original Certificates on September 1, 2000 pursuant to the Original Pooling Agreement. Interests in the Trust established by the Original Pooling Agreement corresponding to the Class A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1B, Class IV-A-2C, Class V-A-1aD, Class V-A-1bE, Class V-A-1cF, Class VG and Class X being issued under this Agreement (the "New Certificates") were issued to the Mortgage Loan Sellers in partial consideration for the Mortgage Loans. Pursuant to this amendment, effective on the Sequel Closing Date, the Mortgage Loan Sellers will transfer such interests to the Depositor, and the Depositor will transfer such interests to the Trustee in exchange for certain uncertificated interests, the New Certificates and the Class R-A-2IIU Certificates and Class R-III Certificates. No changes to the Original Pooling Agreement are made hereby, with respect to the Class H, Class V-A-3J, Class, K, Class VI-A-1aL, Class VI-A-1bM, Class VI-A-1cN, Class VI-A-2 O and Class R P Certificates representing (the "Unaffected Certificates") and the Class V, Class R-I and Class R-II Certificates, and in this and every other respect, except as expressly amended hereby, the aggregate Original Pooling Agreement continues in full force and effect as amended and restated hereby. The New Certificates, together with the Unaffected Certificates, the Class V Certificates and the Residual Certificates, collectively, evidence the entire beneficial ownership interest in the Trust (as defined herein), Trust. It is the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all intention of the Certificates. REMIC I As provided hereinparties, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests parties hereto acknowledges, that this amendment and restatement of the Original Pooling Agreement shall not in any way affect the rights or obligations of a Sub-Servicer under the Amended and Restated Master Subservicing Agreement for Securitization Transactions, dated as of March 25, 1998 among Bank of America, N.A. (as defined hereinsuccessor interest to NationsBank, N.A.), which are hereby designated as the "regular interests" Bankers Mutual (successor in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiiinterest to Bankers Mutual Mortgage Inc.), Berkshire Mortgage Finance Corporation, First Security Bank, N.A., ▇.▇. Melody & Company, Midland Loan Services, Inc. (successor in interest to Midland Loan Services, L.P.), Berkshire Mortgage Finance Bethesda Limited Partnership (successor in interest to Patrician Financial Company Limited Partnership) and Prudential MultiFamily Mortgage, Inc. (successor in interest to Washington Mortgage Financial Group. Ltd.), as supplemented by Sub-Servicer Addition Agreements dated as of September 25, 1998 executed by ARCS Commercial Mortgage Co., L.P., a California limited partnership, and Bank of America, N.A. (successor in interest to Bank of America NT&SA), and as made applicable to the Distribution Date immediately following securitization transaction contemplated by this Agreement by the latest scheduled maturity date for related Confirmation, dated as of September 22, 2000, executed by the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsSub-Servicers listed on Schedule III.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-12 Mortgage Loan Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 12 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-two classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 1-A1B Certificates, (iii) the Class 2-A1A1 Certificates, (iv) the Class 2-A1A2 Certificates, (v) the Class 2-A1B Certificates, (vi) the Class X-1 Certificates, (vii) the Class X-2A Certificates, (viii) the Class X-2B Certificates, (ix) the Class X-B Certificates, (x) the Class PO-1 Certificates, (xi) the Class PO-2A Certificates, (xii) the Class PO-2B Certificates, (xiii) the Class PO-B Certificates, (xiv) the Class A-R Certificates, (xv) the Class A-R-II Certificates, (xvi) the Class B-1 Certificates, (xvii) the Class B-2 Certificates, (xviii) the Class B-3 Certificates, (xix) the Class B-4 Certificates, (xx) the Class B-5 Certificates, (xxi) the Class B-6 Certificates and (xxii) the Class B-7 Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates assets held in the Basis Risk Reserve Fund and the Yield Maintenance Account and the Yield Maintenance Agreement (other than collectively, the Underlying Group V Certificates“Excluded Trust Property”)) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R and Class A-R-II Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, the MTA and LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07 and (ii) the Class 2-A1A2 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 4.04. The owners of the Class X-1, Class X-2A, Class X-2B and Class X-B Certificates beneficially own the Basis Risk Reserve Fund and the owners of the Class X-2B Certificates beneficially own the Yield Maintenance Account. The Class A-R-II Certificate represents ownership of the sole class of residual interest in the Lower-Tier REMIC, and the Class A-R Certificates will represent ownership of the sole class of "residual interests" interest in the Middle-Tier and the Upper-Tier REMICs. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund, other than the Excluded Trust Property and the interests in the Lower-Tier REMIC and the Middle-Tier REMIC formed hereby. The Middle-Tier REMIC shall hold as assets the uncertificated Lower-Tier Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Upper-Tier REMIC shall hold as assets the uncertificated Middle-Tier Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial principal amount for each Lower-Through Tier REMIC Interest: Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Related group LT-Group 1 (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 509,075,890.62 Group 1 LT-Group 1 SCA (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 547,845.86 Group 1 LT-Group 2 (other than the Underlying 2) $ 556,820,067.10 Group V Certificates2 LT-Group 2 SCA (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 599,232.50 Group 2 LT-R (3) (3) N/A

PRELIMINARY STATEMENT. The Trustee on behalf of On June 15, 2006 the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, ClDepositor formed ▇▇▇▇▇▇▇▇▇ ▇▇▇-A-1Mortgage Securities Trust 2006-3, Class IIIas a Delaware statutory trust (the “Trust”) pursuant to (i) the Trust Agreement, dated as of June 15, 2006 (the “Original Trust Agreement”), among the Depositor, the Trustee and the Delaware Trustee and (ii) a Certificate of Trust filed with the Secretary of State of the State of Delaware on June 15, 2006. The parties to this Agreement desire to amend and restate the Original Trust Agreement in its entirety, and, as evidenced by their signatures hereto, the Original Trust Agreement is hereby amended, restated and replaced in its entirety as of the date first written above by this Agreement. Through this Agreement, the Depositor intends to cause the issuance and sale of the Trust’s Mortgage Pass-A-2Through Certificates, Class IVSeries 2006-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 3 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from the Seller. On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor Certificates evidencing the entire beneficial ownership of the Trust. The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. REMIC The Certificates will consist of twelve classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-X Certificates, (v) the Class A-R Certificate, (vi) the Class B-1 Certificates, (vii) the Class B-2 Certificates, (viii) the Class B-3 Certificates, (ix) the Class B-4 Certificates, (x) the Class B-5 Certificates, (xi) the Class B-6 Certificates and (xii) the Class I As provided hereinCertificates. For federal income tax purposes, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting (exclusive of the Underlying Additional Collateral, the Yield Maintenance Agreements, the Auction Swap Agreement, the Yield Maintenance Account, the Final Maturity Reserve Trust, and the Final Maturity Reserve Account, collectively, the “Excluded Trust Assets”) is comprised of three REMICs in a tiered REMIC structure – REMIC 1 (“REMIC 1” or the “Lower Tier REMIC”), REMIC 2 (“REMIC 2” or the “Middle Tier REMIC”) and the upper tier REMIC (“REMIC 3” or the “Upper Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. In addition, the Class A-1, Class A-2 and Class A-3 Certificates represent the right to receive payments from the Yield Maintenance Account as provided in Section 5.09. Each Class of Certificates (other than the Underlying Group V Class A-X Certificates) also represents the right to receive payments in respect of the Final Maturity Reserve Account. The owners of the Class I Certificates beneficially own the Final Maturity Reserve Account and the Final Maturity Reserve Trust. The owners of the Class A-X Certificates beneficially own the Yield Maintenance Account. The Class A-R Certificate represents ownership of the sole class of residual interest in each REMIC. The Lower Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Assets) and will issue interests (the “Lower Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower Tier REMIC) and a residual interest (the “Class LT1-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower Tier REMIC. The Middle Tier REMIC for federal income tax purposeswill hold as its assets the Lower Tier Regular Interests in REMIC 1 and will issue interests (also, designated the “Lower Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Middle Tier REMIC) and a residual interest (the “Class LT2-R Interest”) which will be uncertificated and which will represent the sole class of residual interest in the Middle Tier REMIC. The Trustee will hold the Lower Tier Regular Interests in REMIC 2 as "assets of the Upper Tier REMIC. The Certificates, other than the Class A-R Certificate, will represent “regular interests” in the Upper Tier REMIC, and the Class A-R Certificate, which will represent the sole class of “residual interest” in the Upper Tier REMIC I"as well as ownership of the Class LT1-R and Class LT2-R Interests. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth specifies the designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Principal Balance (as defined herein) principal amount for each Class of the Uncertificated Lower Tier REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" Interest in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1: LT1-Loan Group 1 (other than the Underlying 1) $ 288,020,051.02 Loan Group V Certificates1 LT1-GSA1 (1) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 90,757.08 Loan Group 1 LT1-Loan Group 2 (1) $ 603,013,928.74 Loan Group 2 LT1-GSA2 (1) $ 190,009.38 Loan Group 2 LT1-Loan Group 3 (1) $ 650,245,380.89 Loan Group 3 LT1-GSA3 (1) $ 204,892.74 Loan Group 3 LT1-IO-1 (2) (3) Loan Group 1 LT1-IO-2 (4) (3) Loan Group 2 LT1-IO-3 (5) (3) Loan Group 3 LT1-R (6) (6) N/A __________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as Deutsche Alt-B Securities Mortgage Loan Trust, Series 20072006-R8AB4 Mortgage Pass-Through Certificates (the “Certificates”). The Certificates will consist of 33 classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement, dated as of September 1, 2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, ▇▇▇▇▇ Fargo Bank, N.A. as master servicer (the “Master Servicer”) and as securities administrator and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1A, Class I-A-1A-1B-1, Class I-A-2A-1B-2, Class II-A-1A-1C, Class II▇-A-2▇, Cl▇▇▇▇▇ ▇-▇▇-A-1, Class III-A-2A-3A-1, Class IV-A-1A-3A-2, Class IV-A-2A-4A, Class V-A-1aA-4B, Class V-A-1bA-4C, Class V-A-1cA-5, Class V-A-2A-6A-1, Class VA-6-A-3A2, Class VI-A-1aA-7, Class VI-A-1bM-1, Class VI-A-1cM-2, Class VI-A-2 M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9, Class M-10, Class M-11, Class M-12, Class M-13 and Class M-14 Certificates to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Amended and Restated Underwriting Agreement, dated as of August 1, 2003, as amended to and including September 28, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated September 28, 2006, between the Purchaser and DBSI. The Purchaser will sell the Class M-15, Class CE, Class P and Class R Certificates representing to DBSI pursuant to the Purchase Agreement dated as of September 29, 2006 between Purchaser and DBSI. Capitalized terms used but not defined herein shall have the meanings set forth in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Pooling and Servicing Agreement. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) parties hereto agree as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the Luminent Mortgage Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-5’s Mortgage Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 5 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. REMIC The Certificates will consist of fourteen classes of certificates, designated as (i) the Class A1A Certificates, (ii) the Class A1B Certificates, (iii) the Class A1C Certificates, (iv) the Class X Certificates, (v) the Class PO Certificates, (vi) the Class R Certificates, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates, (xii) the Class B-6 Certificates, (xiii) the Class ES Certificates and (xiv) the Class I Certificates. As provided herein, the Trustee will elect to treat the segregated pool of assets contained in an election shall be made that the Trust Fund consisting (exclusive of the Underlying assets held in the Basis Risk Reserve Fund, the Class ES Distributable Amount, the Final Maturity Reserve Trust and the Final Maturity Reserve Account (the “Excluded Trust Property”)) be treated for federal income tax purposes as comprising two real estate mortgage investment conduits (each, a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class R and Class ES Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. In addition, the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class X Certificates beneficially own the Basis Risk Reserve Fund. The Regular Certificates (other than the Underlying Group V Class X Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes represent the right to receive payments in respect of the REMIC Provisions, Component I Final Maturity Reserve Account. The owners of the Class I Certificates beneficially own the Final Maturity Reserve Account and the Final Maturity Reserve Trust. The Class R Certificates will represent Certificate represents ownership of the sole class of "residual interests" interest in REMIC I. Component I each of the Lower-Tier REMIC and the Upper-Tier REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund, other than the Excluded Trust Property and the Lower-Tier REMIC Interests. The Upper-Tier REMIC shall hold as assets the uncertificated Lower-Tier Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial principal amount for each Lower-Through Tier REMIC Interest: Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Corresponding Class of Certificates LT-A1A (as defined herein1) for each of the Uncertificated REMIC $ 137,373,500.00 Class A1A, Class R LT-A1B (1) $ 57,238,500.00 Class A1B LT-A1C (1) $ 34,343,000.00 Class A1C LT-Q (1) $ 244,218,850.35 N/A LT-Z (1) $ 5,087,890.63 N/A LT-Y (1) $ 5,087,890.63 N/A LT-B1 (1) $ 10,684,500.00 Class B-1 LT-B2 (1) $ 4,833,500.00 Class B-2 LT-B3 (1) $ 2,925,500.00 Class B-3 LT-B4 (1) $ 3,307,000.00 Class B-4 LT-B5 (1) $ 1,908,000.00 Class B-5 LT-B6 (1) $ 1,781,031.61 Class B-6 LT-IO (2) (3) I Regular Interests LT-R (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 4) (other than the Underlying Group V Certificates4) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.N/A

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 11 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund. REMIC I The Certificates will consist of twelve classes of certificates, designated as (i) the Class A-1A Certificates, (ii) the Class A-1B Certificates, (iii) the Class B-1 Certificates, (iv) the Class B-2 Certificates, (v) the Class B-3 Certificates, (vi) the Class B-4 Certificates, (vii) the Class B-5 Certificates, (viii) the Class B-6 Certificates, (ix) the Class B-7 Certificates, (x) the Class C Certificates, (xi) the Class P Certificates and (xii) the Class R Certificates. As provided herein, the Trustee will elect to treat the segregated pool of assets contained in an election shall be made that the Trust Fund consisting (exclusive of (i) the Underlying Certificates Basis Risk Reserve Fund, (other than ii) the Underlying Group V CertificatesSwap Agreement, (iii) as a REMIC the Basis Risk Cap Agreement, (iv) the Basis Risk Cap Replacement Receipts Account, (v) the Basis Risk Cap Termination Receipts Account, (vi) the Swap Account, (vii) the Swap Replacement Receipts Account, (viii) the Swap Termination Receipts Account, (ix) the Supplemental Interest Trust, (x) the obligation to pay Net Swap Payments, and (xi) the right to receive and the obligation to pay Basis Risk Shortfalls and Unpaid Interest Shortfall Amounts (the “Excluded Trust Property”)) be treated for federal income tax purposespurposes as comprising three REMICs in a tiered REMIC structure : the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC.” Any inconsistencies or ambiguities in this Agreement or in the administration of this Agreement shall be resolved in a manner that preserves the validity of such elections. Each Certificate, designated other than the Class R Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates also represent the right to receive payments in respect of Basis Risk Shortfalls from (i) the Basis Risk Reserve Fund as provided in Section 5.07, (ii) the Basis Risk Cap Account as provided in Section 5.09 and (iii) from the Swap Account as provided in Section 5.10. The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Basis Risk Cap Account, the Supplemental Interest Trust and the Swap Account. The Class R Certificate represents the sole class of residual interest in each of the Upper-Tier REMIC, Middle-Tier REMIC, and the Lower-Tier REMIC. The Lower-Tier REMIC I"shall hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue interests (the “Lower-Tier Regular Interests”), which will be uncertificated and will represent the regular interests in the Lower-Tier REMIC, and a residual interest (the “LT-R Interest”), which will also be uncertificated and which will represent the sole class of residual interest in the Lower-Tier REMIC. The Middle-Tier REMIC shall hold as its assets the uncertificated Lower Tier Regular Interests in the Lower-Tier REMIC and will issue interests (the “Middle-Tier Regular Interests”), which will be uncertificated and will represent the regular interests in the Middle-Tier REMIC, and a residual interest (the “MT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower-Tier REMIC. The Upper-Tier REMIC shall hold as its assets the uncertificated Middle-Tier Regular Interests in the Middle-Tier REMIC. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for each REMIC created hereby is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Principal Balance (as defined herein) principal balance for each of the Uncertificated REMIC I Regular Interests interests in the Lower-Tier REMIC: LT-A $ 40,875,707.16 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) LT-F1 $ 4,424,606.25 (other than the Underlying Group V Certificates2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.LT-V1 $ 4,424,606.25 (3) LT-F2 $ 4,793,871.25 (2) LT-V2 $ 4,793,871.25 (3) LT-F3 $ 5,137,295.00 (2) LT-V3 $ 5,137,295.00 (3) LT-F4 $ 5,783,471.25 (2) LT-V4 $ 5,783,471.25 (3) LT-F5 $ 5,156,305.00 (2) LT-V5 $ 5,156,305.00 (3) LT-F6 $ 4,997,538.75 (2) LT-V6 $ 4,997,538.75 (3) LT-F7 $ 4,843,661.25 (2) LT-V7 $ 4,843,661.25 (3) LT-F8 $ 4,694,518.75 (2) LT-V8 $ 4,694,518.75 (3) LT-F9 $ 4,549,967.50 (2) LT-V9 $ 4,549,967.50 (3) LT-F10 $ 4,409,867.50 (2) LT-V10 $ 4,409,867.50 (3) LT-F11 $ 4,274,077.50 (2) LT-V11 $ 4,274,077.50 (3) LT-F12 $ 4,142,468.75 (2) LT-V12 $ 4,142,468.75 (3) LT-F13 $ 4,014,912.50 (2) LT-V13 $ 4,014,912.50 (3) LT-F14 $ 3,891,281.25 (2) LT-V14 $ 3,891,281.25 (3) LT-F15 $ 3,771,456.25 (2) LT-V15 $ 3,771,456.25 (3) LT-F16 $ 3,655,320.00 (2) LT-V16 $ 3,655,320.00 (3) LT-F17 $ 3,542,760.00 (2) LT-V17 $ 3,542,760.00 (3) LT-F18 $ 3,433,662.50 (2) LT-V18 $ 3,433,662.50 (3) LT-F19 $ 3,327,926.25 (2) LT-V19 $ 3,327,926.25 (3) LT-F20 $ 3,225,443.75 (2) LT-V20 $ 3,225,443.75 (3) LT-F21 $ 3,126,116.25 (2) LT-V21 $ 3,126,116.25 (3) LT-F22 $ 3,029,846.25 (2) LT-V22 $ 3,029,846.25 (3) LT-F23 $ 2,936,541.25 (2) LT-V23 $ 2,936,541.25 (3) LT-F24 $ 2,846,107.50 (2) LT-V24 $ 2,846,107.50 (3) LT-F25 $ 2,758,457.50 (2) LT-V25 $ 2,758,457.50 (3) LT-F26 $ 2,673,507.50 (2) LT-V26 $ 2,673,507.50 (3) LT-F27 $ 2,591,172.50 (2) LT-V27 $ 2,591,172.50 (3) LT-F28 $ 2,511,371.25 (2) LT-V28 $ 2,511,371.25 (3) LT-F29 $ 2,434,027.50 (2) LT-V29 $ 2,434,027.50 (3) LT-F30 $ 2,359,065.00 (2) LT-V30 $ 2,359,065.00 (3) LT-F31 $ 2,286,410.00 (2) LT-V31 $ 2,286,410.00 (3) LT-F32 $ 2,215,992.50 (2) LT-V32 $ 2,215,992.50 (3) LT-F33 $ 2,147,742.50 (2) LT-V33 $ 2,147,742.50 (3) LT-F34 $ 2,081,595.00 (2) LT-V34 $ 2,081,595.00 (3) LT-F35 $ 2,017,482.50 (2) LT-V35 $ 2,017,482.50 (3) LT-F36 $ 1,955,343.75 (2) LT-V36 $ 1,955,343.75 (3) LT-F37 $ 1,895,120.00 (2) LT-V37 $ 1,895,120.00 (3) LT-F38 $ 1,836,750.00 (2) LT-V38 $ 1,836,750.00 (3) LT-F39 $ 1,780,176.25 (2) LT-V39 $ 1,780,176.25 (3) LT-F40 $ 1,725,345.00 (2) LT-V40 $ 1,725,345.00 (3) LT-F41 $ 1,672,202.50 (2) LT-V41 $ 1,672,202.50 (3) LT-F42 $ 1,620,695.00 (2) LT-V42 $ 1,620,695.00 (3) LT-F43 $ 1,570,775.00 (2) LT-V43 $ 1,570,775.00 (3) LT-F44 $ 1,522,390.00 (2) LT-V44 $ 1,522,390.00 (3) LT-F45 $ 1,475,497.50 (2) LT-V45 $ 1,475,497.50 (3) LT-F46 $ 1,430,047.50 (2) LT-V46 $ 1,430,047.50 (3) LT-F47 $ 1,385,996.25 (2) LT-V47 $ 1,385,996.25 (3) LT-F48 $ 1,343,302.50 (2) LT-V48 $ 1,343,302.50 (3) LT-F49 $ 1,453,556.25 (2) LT-V49 $ 1,453,556.25 (3) LT-F50 $ 1,632,238.75 (2) LT-V50 $ 1,632,238.75 (3) LT-F51 $ 7,844,956.25 (2) LT-V51 $ 7,844,956.25 (3) LT-F52 $ 12,180,742.50 (2) LT-V52 $ 12,180,742.50 (3) LT-F53 $ 589,963.75 (2) LT-V53 $ 589,963.75 (3) LT-F54 $ 571,782.50 (2) LT-V54 $ 571,782.50 (3) LT-F55 $ 554,161.25 (2) LT-V55 $ 554,161.25 (3) LT-F56 $ 537,083.75 (2) LT-V56 $ 537,083.75 (3) LT-F57 $ 520,530.00 (2) LT-V57 $ 520,530.00 (3) LT-F58 $ 504,487.50 (2) LT-V58 $ 504,487.50 (3) LT-F59 $ 488,940.00 (2) LT-V59 $ 488,940.00 (3) LT-F60 $ 473,871.25 (2) LT-V60 $ 473,871.25 (3) LT-F61 $ 459,265.00 (2) LT-V61 $ 459,265.00 (3) LT-F62 $ 445,110.00 (2) LT-V62 $ 445,110.00 (3) LT-F63 $ 431,391.25 (2) LT-V63 $ 431,391.25 (3) LT-F64 $ 418,095.00 (2) LT-V64 $ 418,095.00 (3) LT-F65 $ 405,208.75 (2) LT-V65 $ 405,208.75 (3) LT-F66 $ 392,717.50 (2) LT-V66 $ 392,717.50 (3) LT-F67 $ 380,613.75 (2) LT-V67 $ 380,613.75 (3) LT-F68 $ 368,881.25 (2) LT-V68 $ 368,881.25 (3) LT-F69 $ 357,511.25 (2) LT-V69 $ 357,511.25 (3) LT-F70 $ 346,491.25 (2) LT-V70 $ 346,491.25 (3) LT-F71 $ 335,810.00 (2) LT-V71 $ 335,810.00 (3) LT-F72 $ 399,658.75 (2) LT-V72 $ 399,658.75 (3) LT-F73 $ 345,087.50 (2) LT-V73 $ 345,087.50 (3) LT-F74 $ 364,772.50 (2) LT-V74 $ 364,772.50 (3) LT-F75 $ 1,738,266.25 (2) LT-V75 $ 1,738,266.25 (3) LT-F76 $ 7,703,782.50 (2) LT-V76 $ 7,703,782.50 (3) LT-R (4) (4) ___________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-five classes of certificates, designated as (i) the Class 1-A1-1 Certificates, (ii) the Class 1-A1-2 Certificates, (iii) the Class 1-A2-A Certificates, (iv) the Class 1-A2-B Certificates, (v) the Class 1-A2-C Certificates,(vi) the Class 2-A-1 Certificates, (vii) the Class 2-A-2 Certificates, (viii) the Class 1-M-1 Certificates, (ix) the Class 1-M-2 Certificates, (x) the Class 1-M-3 Certificates, (xi) the Class 1-M-4 Certificates, (xii) the Class 1-M-5 Certificates, (xiii) the Class 1-M-6 Certificates, (xiv) the Class 1-M-7 Certificates, (x) the Class 1-M-8 Certificates, (xi) the Class 2-M-1 Certificates, (xii) the Class 2-M-2 Certificates, (xiii) the Class 2-M-3 Certificates, (xix) the Class 1-B Certificates, (xx) the Class 2-B Certificates, (xxi) the Class C-R Certificates, (xxii) the Class C-M Certificates, (xxiii) the Class P-R Certificates, (xxiv) the Class P-M Certificates, and (xxv) the Class R Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Loan Group 1 and certain other related assets (other than the Underlying Group V Certificates1 Net WAC Shortfall Reserve Fund, any related Master Servicer Prepayment Charge Payment Amounts and, for the avoidance of doubt, the Group 1 Supplemental Interest Trust, the Group 1 Swap Account and the Group 1 Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of Residual Interests in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-1-A Variable(2) $ 977,900.25 August 2036 1-1-B Variable(2) $ 977,900.25 August 2036 1-2-A Variable(2) $ 1,318,993.50 August 2036 1-2-B Variable(2) $ 1,318,993.50 August 2036 1-3-A Variable(2) $ 1,660,765.50 August 2036 1-3-B Variable(2) $ 1,660,765.50 August 2036 1-4-A Variable(2) $ 2,001,067.50 August 2036 1-4-B Variable(2) $ 2,001,067.50 August 2036 1-5-A Variable(2) $ 2,337,800.50 August 2036 1-5-B Variable(2) $ 2,337,800.50 August 2036 1-6-A Variable(2) $ 2,668,608.00 August 2036 1-6-B Variable(2) $ 2,668,608.00 August 2036 1-7-A Variable(2) $ 2,991,283.25 August 2036 1-7-B Variable(2) $ 2,991,283.25 August 2036 1-8-A Variable(2) $ 3,303,556.00 August 2036 1-8-B Variable(2) $ 3,303,556.00 August 2036 1-9-A Variable(2) $ 3,579,021.00 August 2036 1-9-B Variable(2) $ 3,579,021.00 August 2036 1-10-A Variable(2) $ 3,841,078.75 August 2036 1-10-B Variable(2) $ 3,841,078.75 August 2036 1-11-A Variable(2) $ 3,942,968.00 August 2036 1-11-B Variable(2) $ 3,942,968.00 August 2036 1-12-A Variable(2) $ 3,891,888.50 August 2036 1-12-B Variable(2) $ 3,891,888.50 August 2036 1-13-A Variable(2) $ 3,774,295.50 August 2036 1-13-B Variable(2) $ 3,774,295.50 August 2036 1-14-A Variable(2) $ 3,660,235.75 August 2036 1-14-B Variable(2) $ 3,660,235.75 August 2036 1-15-A Variable(2) $ 3,549,619.50 August 2036 1-15-B Variable(2) $ 3,549,619.50 August 2036 1-16-A Variable(2) $ 3,442,297.50 August 2036 1-16-B Variable(2) $ 3,442,297.50 August 2036 1-17-A Variable(2) $ 3,338,173.25 August 2036 1-17-B Variable(2) $ 3,338,173.25 August 2036 1-18-A Variable(2) $ 3,237,238.25 August 2036 1-18-B Variable(2) $ 3,237,238.25 August 2036 1-19-A Variable(2) $ 3,139,364.00 August 2036 1-19-B Variable(2) $ 3,139,364.00 August 2036 1-20-A Variable(2) $ 8,713,977.25 August 2036 1-20-B Variable(2) $ 8,713,977.25 August 2036 1-21-A Variable(2) $ 2,779,268.75 August 2036 1-21-B Variable(2) $ 2,779,268.75 August 2036 1-22-A Variable(2) $ 5,529,972.00 August 2036 1-22-B Variable(2) $ 5,529,972.00 August 2036 1-23-A Variable(2) $ 6,779,380.50 August 2036 1-23-B Variable(2) $ 6,779,380.50 August 2036 1-24-A Variable(2) $ 3,738,314.50 August 2036 1-24-B Variable(2) $ 3,738,314.50 August 2036 1-25-A Variable(2) $ 2,207,397.50 August 2036 1-25-B Variable(2) $ 2,207,397.50 August 2036 1-26-A Variable(2) $ 2,140,540.00 August 2036 1-26-B Variable(2) $ 2,140,540.00 August 2036 1-27-A Variable(2) $ 2,075,692.50 August 2036 1-27-B Variable(2) $ 2,075,692.50 August 2036 1-28-A Variable(2) $ 2,012,807.50 August 2036 1-28-B Variable(2) $ 2,012,807.50 August 2036 1-29-A Variable(2) $ 1,951,800.00 August 2036 1-29-B Variable(2) $ 1,951,800.00 August 2036 1-30-A Variable(2) $ 1,892,675.00 August 2036 1-30-B Variable(2) $ 1,892,675.00 August 2036 1-31-A Variable(2) $ 1,835,322.50 August 2036 1-31-B Variable(2) $ 1,835,322.50 August 2036 1-32-A Variable(2) $ 1,779,635.00 August 2036 1-32-B Variable(2) $ 1,779,635.00 August 2036 1-33-A Variable(2) $ 1,725,647.50 August 2036 1-33-B Variable(2) $ 1,725,647.50 August 2036 1-34-A Variable(2) $ 7,534,410.00 August 2036 1-34-B Variable(2) $ 7,534,410.00 August 2036 1-35-A Variable(2) $ 1,443,282.50 August 2036 1-35-B Variable(2) $ 1,443,282.50 August 2036 1-36-A Variable(2) $ 8,237,347.50 August 2036 1-36-B Variable(2) $ 8,237,347.50 August 2036 1-37-A Variable(2) $ 1,147,782.50 August 2036 1-37-B Variable(2) $ 1,147,782.50 August 2036 1-38-A Variable(2) $ 1,112,952.50 August 2036 1-38-B Variable(2) $ 1,112,952.50 August 2036 1-39-A Variable(2) $ 1,079,165.00 August 2036 1-39-B Variable(2) $ 1,079,165.00 August 2036 1-40-A Variable(2) $ 1,046,395.00 August 2036 1-40-B Variable(2) $ 1,046,395.00 August 2036 1-41-A Variable(2) $ 1,014,575.00 August 2036 1-41-B Variable(2) $ 1,014,575.00 August 2036 1-42-A Variable(2) $ 983,792.50 August 2036 1-42-B Variable(2) $ 983,792.50 August 2036 1-43-A Variable(2) $ 953,897.50 August 2036 1-43-B Variable(2) $ 953,897.50 August 2036 1-44-A Variable(2) $ 924,885.00 August 2036 1-44-B Variable(2) $ 924,885.00 August 2036 1-45-A Variable(2) $ 896,782.50 August 2036 1-45-B Variable(2) $ 896,782.50 August 2036 1-46-A Variable(2) $ 869,530.00 August 2036 1-46-B Variable(2) $ 869,530.00 August 2036 1-47-A Variable(2) $ 843,095.00 August 2036 1-47-B Variable(2) $ 843,095.00 August 2036 1-48-A Variable(2) $ 817,410.00 August 2036 1-48-B Variable(2) $ 817,410.00 August 2036 1-49-A Variable(2) $ 792,562.50 August 2036 1-49-B Variable(2) $ 792,562.50 August 2036 1-50-A Variable(2) $ 768,442.50 August 2036 1-50-B Variable(2) $ 768,442.50 August 2036 1-51-A Variable(2) $ 745,017.50 August 2036 1-51-B Variable(2) $ 745,017.50 August 2036 1-52-A Variable(2) $ 722,337.50 August 2036 1-52-B Variable(2) $ 722,337.50 August 2036 1-53-A Variable(2) $ 700,365.00 August 2036 1-53-B Variable(2) $ 700,365.00 August 2036 1-54-A Variable(2) $ 679,052.50 August 2036 1-54-B Variable(2) $ 679,052.50 August 2036 1-55-A Variable(2) $ 658,347.50 August 2036 1-55-B Variable(2) $ 658,347.50 August 2036 1-56-A Variable(2) $ 638,282.50 August 2036 1-56-B Variable(2) $ 638,282.50 August 2036 1-57-A Variable(2) $ 618,830.00 August 2036 1-57-B Variable(2) $ 618,830.00 August 2036 1-58-A Variable(2) $ 7,997,132.50 August 2036 1-58-B Variable(2) $ 7,997,132.50 August 2036 1-59-A Variable(2) $ 10,062,652.50 August 2036 1-59-B Variable(2) $ 10,062,652.50 August 2036 1-60-A Variable(2) $ 1,431,030.00 August 2036 1-60-B Variable(2) $ 1,431,030.00 August 2036 1-Non-Swap Variable(2) $ 271,737,769.15 August 2036 P-R Variable(2) $ 100.00 August 2036 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2003-3 Mortgage Loan Pass-Through Certificates, Series 20072003-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 3 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twelve classes of certificates, designated as (i) the Class 1A-1 Certificates, (ii) the Class A-X Certificates, (iii) the Class 2A-1 Certificates, (iv) the Class 2A-2 Certificates, (v) the Class 2A-3 Certificates, (vi) the Class A-R Certificate, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates and (xii) the Class B-6 Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, the Class 1A-1, Class 2A-1, Class 2A-2 and Class 2A-3 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class A-X Certificates beneficially own the Basis Risk Reserve Fund. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, and the interests in any REMIC formed hereby. The Upper Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial Class Principal Amount for each Class of Lower-Through Tier REMIC Interest: Class Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Corresponding Class of Certificates LT1A-1 (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 12,487,500.00 Class 1A-1 LT2A-1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 67,278,000.00 Class 2A-1 LT2A-2 (other than the Underlying 1) $ 15,050,000.00 Class 2A-2 LT2A-3 (1) $ 450,000.00 Class 2-A-3 LTA-R (1) $ 25.00 Class A-R LT-Group V Certificates1 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 13,118,580.37 N/A LT-SC-1 (2) $ 26,293.97 N/A LT-Group 2 (3) $ 86,960,578.04 N/A LT-SC-2 (3) $ 174,274.09 N/A LTQ (1) $ 200,559,452.94 N/A LT-R (4) (4) Class A-R __________________________

PRELIMINARY STATEMENT. The Trustee on behalf Board of Directors of the Depositor has duly authorized the formation of a trust (the "Trust") to issue a series of asset backed certificates with an aggregate initial Certificate Principal Balance of $740,000,001 to be known as the Saxon Asset Securities Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2000-2, Mortgage Loan Asset Backed Certificates, Series 20072000-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R 2 (the "Certificates"). The Certificates representing in the aggregate evidence the entire beneficial ownership in the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Trust. The Depositor intends to sell some or all Certificates consist of the following: the Class AF-1, Class AF-2, Class AF-3, Class AF-4, Class AF-5, Class AF-6, Class MF-1, Class MF-2, Class BF-1, Class BF-2, Class AV-1, Class MV-1, Class MV-2, Class BV-1, Class BV-2, Class A-IO, Class PF-1, Class PV-1, Class C and Class R Certificates. REMIC I As provided hereinIn accordance with Section 10.01 of the Standard Terms, the Trustee will elect make elections to treat each of the segregated pool pools of assets contained described below as a real estate mortgage investment conduit (each a "REMIC" or, in the Trust Fund consisting of alternative, the Underlying Certificates (POOLING REMIC, the SECOND-TIER REMIC, and the ISSUING REMIC. The Certificates, other than the Underlying Group V Class R Certificates) , represent ownership of the regular interests in the ISSUING REMIC for purposes of the REMIC Provisions. The Class R Certificates represents ownership of the sole class of residual interest in each of the POOLING REMIC, the SECOND-TIER REMIC, and the ISSUING REMIC for purposes of the REMIC Provisions. The ISSUING REMIC shall hold as its assets the several classes of uncertificated Lower Tier Interests in the SECOND- TIER REMIC, other than the Class LT2-R Interest, and each such Lower Tier Interest is hereby designated as a regular interest in the SECOND-TIER REMIC for federal income tax purposespurposes of the REMIC Provisions. The SECOND-TIER REMIC shall hold as its assets the several classes of uncertificated Lower Tier Interests in the POOLING REMIC, other than the Class LT1-R Interest, and each such Lower Tier Interest is hereby designated as "a regular interest in the POOLING REMIC. The POOLING REMIC I"shall hold as its assets the property of the Trust Estate other than the Lower Tier Interests in the POOLING REMIC and the SECOND-TIER REMIC, the Prefunding Account, and the Capitalized Interest Account. For The startup day for each REMIC created hereby for purposes of the REMIC Provisions is the Closing Date. In addition, for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled possible maturity date for each regular interest in each REMIC created hereby is the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each date specified in Section 9.01 of the Uncertificated REMIC I Regular InterestsStandard Terms.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class X Certificates, (vii) the Class M-1 Certificates (viii) the Class M-2 Certificates, (ix) the Class M-3 Certificates, (x) the Class M-4 Certificates, (xi) the Class M-5 Certificates, (xii) the Class M-6 Certificates, (xiii) the Class M-7 Certificates, (xiv) the Class M-8 Certificates, (xv) the Class M-9 Certificates, (xvi) the Class M-10 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, any Serivicer Prepayment Charge Payment Amounts, the Supplemental Interest Trust, the Cap Trust, the Interest Rate Swap Agreement and the Basis Risk Cap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the Uncertificated REMIC 1 Regular Interests shall be certificated. I Regular Interests.Variable(2) $ 430,245,347.03 June 25, 2037 I-2-B Variable(2) $ 20,085,446.25 June 25, 2037 I-3-B Variable(2) $ 22,154,972.50 June 25, 2037 I-5-B Variable(2) $ 25,799,133.75 June 25, 2037 I-6-B Variable(2) $ 26,546,071.25 June 25, 2037 I-7-A Variable(2) $ 25,846,586.25 June 25, 2037 I-7-B Variable(2) $ 25,846,586.25 June 25, 2037 I-8-B Variable(2) $ 25,160,798.75 June 25, 2037 I-11-B Variable(2) $ 23,136,780.00 June 25, 2037 I-12-B Variable(2) $ 22,476,882.50 June 25, 2037 I-13-B Variable(2) $ 21,823,940.00 June 25, 2037 I-14-B Variable(2) $ 21,208,482.50 June 25, 2037 I-15-B Variable(2) $ 20,730,631.25 June 25, 2037 I-16-B Variable(2) $ 22,138,873.75 June 25, 2037 I-17-B Variable(2) $ 28,979,567.50 June 25, 2037 I-18-A Variable(2) $ 40,023,296.25 June 25, 2037 I-18-B Variable(2) $ 40,023,296.25 June 25, 2037 I-19-A Variable(2) $ 37,198,032.50 June 25, 2037 I-19-B Variable(2) $ 37,198,032.50 June 25, 2037 I-20-B Variable(2) $ 33,418,420.00 June 25, 2037 I-21-B Variable(2) $ 26,372,645.00 June 25, 2037 I-23-B Variable(2) $ 16,314,478.75 June 25, 2037 I-24-B Variable(2) $ 15,797,358.75 June 25, 2037 I-25-B Variable(2) $ 15,295,202.50 June 25, 2037 I-26-B Variable(2) $ 14,812,265.00 June 25, 2037 I-27-B Variable(2) $ 14,345,303.75 June 25, 2037 I-28-B Variable(2) $ 13,893,767.50 June 25, 2037 I-29-A Variable(2) $ 13,456,983.75 June 25, 2037 I-29-B Variable(2) $ 13,456,983.75 June 25, 2037 I-30-B Variable(2) $ 13,034,215.00 June 25, 2037 I-32-B Variable(2) $ 11,288,430.00 June 25, 2037 I-33-B Variable(2) $ 10,936,047.50 June 25, 2037 I-34-B Variable(2) $ 10,595,236.25 June 25, 2037 I-36-B Variable(2) $ 9,946,720.00 June 25, 2037 I-37-B Variable(2) $ 9,638,213.75 June 25, 2037 I-38-A Variable(2) $ 9,339,905.00 June 25, 2037 I-38-B Variable(2) $ 9,339,905.00 June 25, 2037 I-39-A Variable(2) $ 9,051,336.25 June 25, 2037 I-39-B Variable(2) $ 9,051,336.25 June 25, 2037 I-40-A Variable(2) $ 8,772,176.25 June 25, 2037 I-40-B Variable(2) $ 8,772,176.25 June 25, 2037 I-41-A Variable(2) $ 8,502,111.25 June 25, 2037 I-41-B Variable(2) $ 8,502,111.25 June 25, 2037 I-42-A Variable(2) $ 8,240,836.25 June 25, 2037 I-42-B Variable(2) $ 8,240,836.25 June 25, 2037 I-43-A Variable(2) $ 7,988,033.75 June 25, 2037 I-43-B Variable(2) $ 7,988,033.75 June 25, 2037 I-44-A Variable(2) $ 7,743,458.75 June 25, 2037 I-44-B Variable(2) $ 7,743,458.75 June 25, 2037 I-45-A Variable(2) $ 7,506,800.00 June 25, 2037 I-45-B Variable(2) $ 7,506,800.00 June 25, 2037 I-47-A Variable(2) $ 7,056,212.50 June 25, 2037 I-47-B Variable(2) $ 7,056,212.50 June 25, 2037 I-48-A Variable(2) $ 6,841,771.25 June 25, 2037 I-48-B Variable(2) $ 6,841,771.25 June 25, 2037 I-49-A Variable(2) $ 6,634,243.75 June 25, 2037 I-49-B Variable(2) $ 6,634,243.75 June 25, 2037 I-50-A Variable(2) $ 6,433,400.00 June 25, 2037 I-50-B Variable(2) $ 6,433,400.00 June 25, 2037 I-51-B Variable(2) $ 6,239,310.00 June 25, 2037 I-52-A Variable(2) $ 6,051,157.50 June 25, 2037 I-52-B Variable(2) $ 6,051,157.50 June 25, 2037 I-53-B Variable(2) $ 5,869,037.50 June 25, 2037 I-54-B Variable(2) $ 5,693,431.25 June 25, 2037 I-55-A Variable(2) $ 5,523,041.25 June 25, 2037 I-55-B Variable(2) $ 5,523,041.25 June 25, 2037 I-56-A Variable(2) $ 5,357,807.50 June 25, 2037 I-56-B Variable(2) $ 5,357,807.50 June 25, 2037 I-57-A Variable(2) $ 5,197,843.75 June 25, 2037 I-57-B Variable(2) $ 5,197,843.75 June 25, 2037 I-58-A Variable(2) $ 5,042,971.25 June 25, 2037 I-58-B Variable(2) $ 5,042,971.25 June 25, 2037 I-59-A Variable(2) $ 4,892,996.25 June 25, 2037 I-59-B Variable(2) $ 4,892,996.25 June 25, 2037 I-60-A Variable(2) $ 4,747,777.50 June 25, 2037 I-60-B Variable(2) $ 4,747,777.50 June 25, 2037 I-61-A Variable(2) $ 4,607,052.50 June 25, 2037 I-61-B Variable(2) $ 4,607,052.50 June 25, 2037 I-62-A Variable(2) $ 4,470,930.00 June 25, 2037 I-62-B Variable(2) $ 4,470,930.00 June 25, 2037 I-63-A Variable(2) $ 4,339,108.75 June 25, 2037 I-63-B Variable(2) $ 4,339,108.75 June 25, 2037 I-64-B Variable(2) $ 4,211,445.00 June 25, 2037 I-65-B Variable(2) $ 4,087,800.00 June 25, 2037 I-66-A Variable(2) $ 3,968,042.50 June 25, 2037 I-66-B Variable(2) $ 3,968,042.50 June 25, 2037 I-67-A Variable(2) $ 3,852,026.25 June 25, 2037 I-67-B Variable(2) $ 3,852,026.25 June 25, 2037 I-68-A Variable(2) $ 3,739,671.25 June 25, 2037 I-68-B Variable(2) $ 3,739,671.25 June 25, 2037 I-69-A Variable(2) $ 3,630,832.50 June 25, 2037 I-69-B Variable(2) $ 3,630,832.50 June 25, 2037 I-70-A Variable(2) $ 3,525,395.00 June 25, 2037 I-70-B Variable(2) $ 3,525,395.00 June 25, 2037 I-71-A Variable(2) $ 3,422,776.25 June 25, 2037 I-71-B Variable(2) $ 3,422,776.25 June 25, 2037 I-72-A Variable(2) $ 3,323,821.25 June 25, 2037 I-72-B Variable(2) $ 3,323,821.25 June 25, 2037 I-73-A Variable(2) $ 3,227,942.50 June 25, 2037 I-73-B Variable(2) $ 3,227,942.50 June 25, 2037 I-74-A Variable(2) $ 3,135,041.25 June 25, 2037 I-74-B Variable(2) $ 3,135,041.25 June 25, 2037 I-75-A Variable(2) $ 3,045,015.00 June 25, 2037 I-75-B Variable(2) $ 3,045,015.00 June 25, 2037 I-76-B Variable(2) $ 2,957,775.00 June 25, 2037 P Variable(2) $ 100.00 June 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-IO Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class B-1 Certificates, (xv) the Class P Certificates, (xvi) the Class X-1 Certificates, (xvii) the Class X-2 Certificates, (xviii) the Class X-S Certificates and (xix) the Class A-R Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Account, Basis Risk Reserve Fund, Swap Account, the Capitalized Interest Account, the Supplemental Interest Trust and the Subsequent Mortgage Loan Interest) as a REMIC real estate mortgage investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated “regular interests” in REMIC I 1 (the “REMIC 1 Regular Interests”). None of the REMIC 1 Regular Interests will be certificated. The latest possible maturity date (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely determined for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for of each of the Uncertificated REMIC I 1 Regular Interests.Interests will be the Latest Possible Maturity Date as defined herein. LTI-1 Variable(1) $ 686,924,203.79 LTI-PF Variable(1) $ 113,075,796.21 LTI-AR Variable(1) $ 100.00 LTI-P Variable(1) $ 100.00 ___________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8OP1, Asset Backed Pass-Through Certificates (the “Certificates”). The Certificates will consist of twenty classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Series 2006-OP1, Asset Backed Pass-Through Certificates, dated as of May 1, 2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, W▇▇▇▇ Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Option One Mortgage Corporation as servicer (the “Servicer”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1A Certificates, Class I-A-1A-▇▇, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇▇▇ ▇-▇▇-A-1, ▇▇▇▇▇ ▇-▇▇, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 A-2C and Class R A-2D Certificates representing in (collectively, the aggregate the entire beneficial ownership the Trust (as defined herein“Class A Certificates”), the primary assets of which are the Underlying Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9, Class M-10 and Class M-11 Certificates (collectively, the “Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as of June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated May 17, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. Capitalized terms used but not defined herein)herein shall have the meanings set forth in the Pooling and Servicing Agreement. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) parties hereto agree as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass‑through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A Certificates, (ii) the Class II-A1 Certificates, (iii) the Class II-A2 Certificates, (iv) the Class II-A3 Certificates, (v) the Class II‑A4 Certificates, (vi) the Class M‑1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M‑4 Certificates, (x) the Class M‑5 Certificates, (xi) the Class M‑6 Certificates, (xii) the Class M‑7 Certificates, (xiii) the Class M‑8 Certificates, (xiv) the Class M‑9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class M-11 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R‑CX Certificates and (xxi) the Class R‑PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R‑1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and REMIC 1 Pass‑Through Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiiSection 1.860G‑1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass‑Through Rate Rate Change Date Assumed Final Maturity Date1 IX3 $ 69,055,533.90 Variable2 N/A September 2046 I-5-B 809,527.24 Variable2 September 2046 I-11-B 4,962,685.80 Variable2 September 2046 I-13-B 5,260,790.23 Variable2 September 2046 I-14-B 5,108,881.09 Variable2 September 2046 I-18-B 5,350,858.39 Variable2 September 2046 I-21-B 4,423,276.85 Variable2 September 2046 I-22-B 38,627,646.06 Variable2 September 2046 I-23-B 5,398,719.47 Variable2 September 2046 I-24-B 5,782,309.39 Variable2 September 2046 I-25-B 4,756,253.02 Variable2 September 2046 I-26-A 3,670,650.79 Variable2 November 2008 September 2046 I-26-B 3,670,650.79 Variable2 September 2046 I-27-A 3,028,452.45 Variable2 December 2008 September 2046 I-27-B 3,028,452.45 Variable2 September 2046 I-28-B 2,610,073.37 Variable2 September 2046 I-29-A 2,310,421.80 Variable2 February 2009 September 2046 I-29-B 2,310,421.80 Variable2 September 2046 I-30-B 1,974,020.47 Variable2 September 2046 I-34-B 2,173,428.98 Variable2 September 2046 I-35-B 2,132,749.37 Variable2 September 2046 I-36-A 779,569.33 Variable2 September 2009 September 2046 I-36-B 779,569.33 Variable2 September 2046 I-38-B 1,588,609.32 Variable2 September 2046 I-39-A 1,535,261.76 Variable2 December 2009 September 2046 I-39-B 1,535,261.76 Variable2 September 2046 I-40-B 1,473,266.51 Variable2 September 2046 I-41-B 1,431,467.73 Variable2 September 2046 I-42-A 1,344,435.95 Variable2 March 2010 September 2046 I-42-B 1,344,435.95 Variable2 September 2046 I-43-A 1,242,297.71 Variable2 April 2010 September 2046 I-44-A 1,012,984.03 Variable2 May 2010 September 2046 I-44-B 1,012,984.03 Variable2 September 2046 I-45-A 970,865.81 Variable2 June 2010 September 2046 I-45-B 970,865.81 Variable2 September 2046 I-47-B 899,495.38 Variable2 September 2046 I-48-B 856,459.15 Variable2 September 2046 I-49-A 805,765.34 Variable2 October 2010 September 2046 I-49-B 805,765.34 Variable2 September 2046 I-50-A 890,746.41 Variable2 November 2010 September 2046 I-50-B 890,746.41 Variable2 September 2046 I-51-A 885,985.03 Variable2 December 2010 September 2046 I-51-B 885,985.03 Variable2 September 2046 I-52-A 822,331.60 Variable2 January 2011 September 2046 I-52-B 822,331.60 Variable2 September 2046 I-53-B 780,114.76 Variable2 September 2046 I-54-A 803,777.96 Variable2 March 2011 September 2046 I-54-B 803,777.96 Variable2 September 2046 I-55-A 724,199.80 Variable2 April 2011 September 2046 I-55-B 724,199.80 Variable2 September 2046 I-56-A 766,582.93 Variable2 May 2011 September 2046 I-56-B 766,582.93 Variable2 September 2046 I-57-A 704,101.11 Variable2 June 2011 September 2046 I-57-B 704,101.11 Variable2 September 2046 I-58-A 630,308.64 Variable2 July 2011 September 2046 I-58-B 630,308.64 Variable2 September 2046 IIX3 178,464,568.91 Variable2 N/A September 2046 II-1-B 4,236,495.26 Variable2 September 2046 II-2-B 4,985,283.67 Variable2 September 2046 II-3-B 5,727,381.46 Variable2 September 2046 II-4-B 6,459,568.24 Variable2 September 2046 II-6-B 2,967,674.49 Variable2 September 2046 II-8-A 5,354,481.01 Variable2 May 2007 September 2046 II-8-B 5,354,481.01 Variable2 September 2046 II-10-B 8,248,277.53 Variable2 September 2046 II-11-B 12,825,381.70 Variable2 September 2046 II-12-B 13,487,190.30 Variable2 September 2046 II-13-A 13,595,791.77 Variable2 October 2007 September 2046 II-13-B 13,595,791.77 Variable2 September 2046 II-14-B 13,203,203.41 Variable2 September 2046 II-15-B 16,502,150.82 Variable2 September 2046 II-16-B 15,857,809.06 Variable2 September 2046 II-17-B 14,642,120.27 Variable2 September 2046 II-18-A 13,828,560.61 Variable2 March 2008 September 2046 II-18-B 13,828,560.61 Variable2 September 2046 II-19-A 12,943,845.16 Variable2 April 2008 September 2046 II-19-B 12,943,845.16 Variable2 September 2046 II-20-A 12,159,168.81 Variable2 May 2008 September 2046 II-20-B 12,159,168.81 Variable2 September 2046 II-21-B 11,431,353.15 Variable2 September 2046 II-22-B 99,827,860.44 Variable2 September 2046 II-23-B 13,952,251.03 Variable2 September 2046 II-24-A 14,943,586.61 Variable2 September 2008 September 2046 II-24-B 14,943,586.61 Variable2 September 2046 II-25-A 12,291,884.48 Variable2 October 2008 September 2046 II-25-B 12,291,884.48 Variable2 September 2046 II-26-A 9,486,294.21 Variable2 November 2008 September 2046 II-26-B 9,486,294.21 Variable2 September 2046 II-27-A 7,826,620.55 Variable2 December 2008 September 2046 II-27-B 7,826,620.55 Variable2 September 2046 II-28-A 6,745,377.13 Variable2 January 2009 September 2046 II-28-B 6,745,377.13 Variable2 September 2046 II-29-A 5,970,968.70 Variable2 February 2009 September 2046 II-29-B 5,970,968.70 Variable2 September 2046 II-30-A 5,101,585.53 Variable2 March 2009 September 2046 II-30-B 5,101,585.53 Variable2 September 2046 II-32-A 4,701,168.08 Variable2 May 2009 September 2046 II-32-B 4,701,168.08 Variable2 September 2046 II-33-A 4,513,387.04 Variable2 June 2009 September 2046 II-33-B 4,513,387.04 Variable2 September 2046 II-34-A 5,616,929.52 Variable2 July 2009 September 2046 II-34-B 5,616,929.52 Variable2 September 2046 II-35-A 5,511,798.63 Variable2 August 2009 September 2046 II-35-B 5,511,798.63 Variable2 September 2046 II-36-A 2,014,690.17 Variable2 September 2009 September 2046 II-36-B 2,014,690.17 Variable2 September 2046 II-37-A 3,098,748.05 Variable2 October 2009 September 2046 II-37-B 3,098,748.05 Variable2 September 2046 II-38-A 4,105,543.18 Variable2 November 2009 September 2046 II-38-B 4,105,543.18 Variable2 September 2046 II-39-A 3,967,673.74 Variable2 December 2009 September 2046 II-39-B 3,967,673.74 Variable2 September 2046 II-40-A 3,807,455.49 Variable2 January 2010 September 2046 II-40-B 3,807,455.49 Variable2 September 2046 II-41-A 3,699,432.27 Variable2 February 2010 September 2046 II-41-B 3,699,432.27 Variable2 September 2046 II-42-A 3,474,510.55 Variable2 March 2010 September 2046 II-42-B 3,474,510.55 Variable2 September 2046 II-43-A 3,210,548.29 Variable2 April 2010 September 2046 II-43-B 3,210,548.29 Variable2 September 2046 II-44-A 2,617,918.47 Variable2 May 2010 September 2046 II-44-B 2,617,918.47 Variable2 September 2046 II-45-A 2,509,069.69 Variable2 June 2010 September 2046 II-45-B 2,509,069.69 Variable2 September 2046 II-47-A 2,324,622.62 Variable2 August 2010 September 2046 II-47-B 2,324,622.62 Variable2 September 2046 II-48-A 2,213,401.35 Variable2 September 2010 September 2046 II-48-B 2,213,401.35 Variable2 September 2046 II-49-A 2,082,390.16 Variable2 October 2010 September 2046 II-49-B 2,082,390.16 Variable2 September 2046 II-50-A 2,302,012.09 Variable2 November 2010 September 2046 II-50-B 2,302,012.09 Variable2 September 2046 II-51-B 2,289,706.97 Variable2 September 2046 II-52-A 2,125,203.40 Variable2 January 2011 September 2046 II-52-B 2,125,203.40 Variable2 September 2046 II-53-A 2,016,099.74 Variable2 February 2011 September 2046 II-53-B 2,016,099.74 Variable2 September 2046 II-54-A 2,077,254.04 Variable2 March 2011 September 2046 II-54-B 2,077,254.04 Variable2 September 2046 II-55-A 1,871,595.20 Variable2 April 2011 September 2046 II-55-B 1,871,595.20 Variable2 September 2046 II-56-A 1,981,128.57 Variable2 May 2011 September 2046 II-56-B 1,981,128.57 Variable2 September 2046 II-57-A 1,819,652.89 Variable2 June 2011 September 2046 II-57-B 1,819,652.89 Variable2 September 2046 II-58-A 1,628,946.36 Variable2 July 2011 September 2046 II-58-B 1,628,946.36 Variable2 September 2046 II-59-A 23,940,936.99 Variable2 August 2011 September 2046 II-59-B 23,940,936.99 Variable2 September 2046 1 Solely for purposes of Section 1.860G‑1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass‑Through Rate” herein. 3 REMIC 1 Regular Interest IX will be entitled to all prepayment penalties or charges with respect to the Group I Mortgage Loans; REMIC 1 Regular Interest IIX will be entitled to all prepayment penalties or charges with respect to the Group II Mortgage Loans. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests and certain other related assets subject to this Agreement (exclusive of the Reserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as “REMIC 2.” The Class R‑2 Interest shall represent the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 2 Pass-Through Rate, the initial Uncertificated Principal Balance, and solely for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 2 Regular Interests. None of the REMIC 2 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC I 2 Pass-Through Rate Assumed Final Maturity Date1 AA $782,339,394.81 Variable2 September 2046 A-IA 1,800,695.00 Variable2 September 2046 A-IIA1 2,045,840.00 Variable2 September 2046 A-IIA2 711,390.00 Variable2 September 2046 A-IIA3 1,431,045.00 Variable2 September 2046 A-IIA4 465,345.00 Variable2 September 2046 M1 255,460.00 Variable2 September 2046 M2 239,490.00 Variable2 September 2046 M3 147,685.00 Variable2 September 2046 M4 131,720.00 Variable2 September 2046 M5 127,730.00 Variable2 September 2046 M6 103,780.00 Variable2 September 2046 M7 79,830.00 Variable2 September 2046 M8 79,830.00 Variable2 September 2046 M9 55,880.00 Variable2 September 2046 M10 55,880.00 Variable2 September 2046 M11 79,830.00 Variable2 September 2046 ZZ 8,154,680.10 Variable2 September 2046 1GRP 44,543.79 Variable2 September 2046 1SUB 8,529.89 Variable2 September 2046 2GRP 22,044.91 Variable2 September 2046 2SUB 115,117.31 Variable2 September 2046 Swap IO N/A3 Variable2 September 2046 FMR IO N/A4 Variable2 September 2046 XX 798,115,269.00 Variable2 September 2046 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each REMIC 2 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 2 Pass-Through Rate” herein. 3 REMIC 2 Regular Interest Swap IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of the REMIC 1 Regular Interests with the designation “A”. 4 REMIC 2 Regular Interest FMR IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of all of the REMIC 1 Regular Interests. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 2 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 3.” The Class R‑3 Interest represents the sole class of “residual interests” in REMIC 3 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 3 and each class of uncertificated “regular interests” in REMIC 3: I‑A $360,139,000.00 Variable2 September 2046 II-A1 409,168,000.00 Variable2 September 2046 II-A2 142,278,000.00 Variable2 September 2046 II-A3 286,209,000.00 Variable2 September 2046 II-A4 93,069,000.00 Variable2 September 2046 M‑1 51,092,000.00 Variable2 September 2046 M‑2 47,898,000.00 Variable2 September 2046 M‑3 29,537,000.00 Variable2 September 2046 M‑4 26,344,000.00 Variable2 September 2046 M‑5 25,546,000.00 Variable2 September 2046 M‑6 20,756,000.00 Variable2 September 2046 M‑7 15,966,000.00 Variable2 September 2046 M‑8 15,966,000.00 Variable2 September 2046 M‑9 11,176,000.00 Variable2 September 2046 M-10 11,176,000.00 Variable2 September 2046 M‑11 15,966,000.00 Variable2 September 2046 Swap IO N/A Variable5 September 2046 FM Reserve IO N/A Variable5 September 2046 Class C Interest3 34,324,909.81 Variable2 September 2046 Class P Interest $100.00 N/A4 September 2046 ___________________ 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each Class of Certificates or uncertificated interests that represents one or more of the “regular interests” in REMIC 3. 2 Calculated in accordance with the definition of “Pass-Through Rate” herein. 3 The Class C Interest will accrue interest at its variable Pass-Through Rate on its Notional Amount outstanding from time to time, which shall equal the aggregate of the Uncertificated Principal Balances of the REMIC 2 Regular Interests. The Class C Interest will not accrue interest on its Uncertificated Principal Balance. 4 The Class P Interest will not accrue interest. 5 The interests designated “Swap IO” and “FM Reserve IO” will not have principal amounts or interest rates but will be entitled to 100% of the interest paid on REMIC 2 Regular Interests Swap IO and FMR IO, respectively. These interests will not be certificated.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty one classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class M-10 Certificates, (xv) the Class M-11 Certificates, (xvi) the Class M-12 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Group I Mortgage Loans, the Group II Mortgage Loans and certain other related assets subject to this Agreement (other than but exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Master Servicer Prepayment Charge Payment Amounts, the Interest Coverage Account, the Swap Account and the Interest Rate Swap Agreement) as a REMIC real estate investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the Uncertificated REMIC I 1 Regular Interests.. None of the REMIC 1 Regular Interests will be certificated. I-1-B Variable $ 9,290,151.64 November 2035 I-2-A Variable $ 11,097,571.46 November 2035 I-2-B Variable $ 11,097,571.46 November 2035 I-3-B Variable $ 12,884,895.21 November 2035 I-4-B Variable $ 14,643,735.33 November 2035 I-5-A Variable $ 16,364,029.36 November 2035 I-5-B Variable $ 16,364,029.36 November 2035 I-6-A Variable $ 18,036,032.89 November 2035 I-6-B Variable $ 18,036,032.89 November 2035 I-7-A Variable $ 19,649,898.60 November 2035 I-7-B Variable $ 19,649,898.60 November 2035 I-8-A Variable $ 21,195,830.08 November 2035 I-8-B Variable $ 21,195,830.08 November 2035 I-9-A Variable $ 22,664,150.14 November 2035 I-9-B Variable $ 22,664,150.14 November 2035 I-10-A Variable $ 24,040,720.65 November 2035 I-10-B Variable $ 24,040,720.65 November 2035 I-11-A Variable $ 24,985,439.45 November 2035 I-11-B Variable $ 24,985,439.45 November 2035 I-12-A Variable $ 25,773,669.19 November 2035 I-12-B Variable $ 25,773,669.19 November 2035 I-13-A Variable $ 26,479,760.65 November 2035 I-13-B Variable $ 26,479,760.65 November 2035 I-14-A Variable $ 27,098,101.21 November 2035 I-14-B Variable $ 27,098,101.21 November 2035 I-15-A Variable $ 27,623,771.23 November 2035 I-15-B Variable $ 27,623,771.23 November 2035 I-16-A Variable $ 28,052,508.34 November 2035 I-16-B Variable $ 28,052,508.34 November 2035 I-17-A Variable $ 28,380,726.96 November 2035 I-17-B Variable $ 28,380,726.96 November 2035 I-18-A Variable $ 28,605,727.66 November 2035 I-18-B Variable $ 28,605,727.66 November 2035 I-19-A Variable $ 28,725,298.35 November 2035 I-19-B Variable $ 28,725,298.35 November 2035 I-20-A Variable $ 28,737,978.06 November 2035 I-20-B Variable $ 28,737,978.06 November 2035 I-21-A Variable $ 28,643,233.90 November 2035 I-21-B Variable $ 28,643,233.90 November 2035 I-22-B Variable $ 28,433,299.30 November 2035 I-23-A Variable $ 26,797,776.75 November 2035 I-23-B Variable $ 26,797,776.75 November 2035 I-24-A Variable $ 25,280,895.43 November 2035 I-24-B Variable $ 25,280,895.43 November 2035 I-25-A Variable $ 23,853,628.18 November 2035 I-25-B Variable $ 23,853,628.18 November 2035 I-26-A Variable $ 22,509,559.50 November 2035 I-26-B Variable $ 22,509,559.50 November 2035 I-27-A Variable $ 21,243,755.83 November 2035 I-27-B Variable $ 21,243,755.83 November 2035 I-28-A Variable $ 20,051,578.73 November 2035 I-28-B Variable $ 20,051,578.73 November 2035 I-29-A Variable $ 18,928,607.50 November 2035 I-29-B Variable $ 18,928,607.50 November 2035 I-30-A Variable $ 17,870,787.08 November 2035 I-30-B Variable $ 17,870,787.08 November 2035 I-32-B Variable $ 15,935,605.04 November 2035 I-33-A Variable $ 15,051,145.14 November 2035 I-33-B Variable $ 15,051,145.14 November 2035 I-34-A Variable $ 14,217,545.79 November 2035 I-34-B Variable $ 14,217,545.79 November 2035 I-35-A Variable $ 13,431,020.73 November 2035 I-35-B Variable $ 13,431,020.73 November 2035 I-36-A Variable $ 12,691,027.83 November 2035 I-36-B Variable $ 12,691,027.83 November 2035 I-37-A Variable $ 11,993,631.98 November 2035 I-37-B Variable $ 11,993,631.98 November 2035 I-38-A Variable $ 11,336,274.36 November 2035 I-38-B Variable $ 11,336,274.36 November 2035 I-39-A Variable $ 10,716,599.64 November 2035 I-39-B Variable $ 10,716,599.64 November 2035 I-40-A Variable $ 10,132,392.80 November 2035 I-40-B Variable $ 10,132,392.80 November 2035 I-41-A Variable $ 9,581,570.75 November 2035 I-41-B Variable $ 9,581,570.75 November 2035 I-42-A Variable $ 9,062,174.36 November 2035 I-42-B Variable $ 9,062,174.36 November 2035 I-43-A Variable $ 8,572,361.14 November 2035 I-43-B Variable $ 8,572,361.14 November 2035 I-44-A Variable $ 8,110,398.11 November 2035 I-44-B Variable $ 8,110,398.11 November 2035 I-45-A Variable $ 7,674,655.39 November 2035 I-45-B Variable $ 7,674,655.39 November 2035 I-46-B Variable $ 7,263,599.86 November 2035 I-47-A Variable $ 6,875,789.56 November 2035 I-47-B Variable $ 6,875,789.56 November 2035 I-48-A Variable $ 6,509,868.05 November 2035 I-48-B Variable $ 6,509,868.05 November 2035 I-49-A Variable $ 6,164,559.40 November 2035 I-49-B Variable $ 6,164,559.40 November 2035 I-50-A Variable $ 5,838,663.38 November 2035 I-50-B Variable $ 5,838,663.38 November 2035 I-51-A Variable $ 5,531,050.81 November 2035 I-51-B Variable $ 5,531,050.81 November 2035 I-52-A Variable $ 5,240,659.47 November 2035 I-52-B Variable $ 5,240,659.47 November 2035 I-53-A Variable $ 104,532,091.24 November 2035 I-53-B Variable $ 104,532,091.24 November 2035

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-AR5 DSLA Mortgage Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR5 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 1-A1B Certificates, (iii) the Class 2-A1A Certificates, (iv) the Class 2-A1B Certificates, (v) the Class X-1 Certificates, (vi) the Class X-2 Certificates, (vii) the Class PO Certificates (viii) the Class A-R Certificate, (ix) the Class B-1 Certificates, (x) the Class B-2 Certificates, (xi) the Class B-3 Certificates, (xii) the Class B-4 Certificates, (xiii) the Class B-5 Certificates, (xiv) the Class B-6 Certificates, (xv) the Class B-7 Certificates and (xvi) the Class A-R-II Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund, the Yield Maintenance Account, and the Yield Maintenance Agreements) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R and Class A-R-II Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Class 1-A1A, Class 1-A1B, Class 2-A1A, Class 2-A1B, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5, Class B-6, and Class B-7 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls. The Class X-2 Certificates, in addition to representing beneficial ownership of REMIC I". For purposes regular interests, also represent beneficial ownership of the REMIC Provisions, Component I Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificate represents the ownership of the sole residual interest in each of the Middle-Tier REMIC and the Upper-Tier REMIC. The Class R Certificates will represent A-R-II Certificate represents ownership of the sole class of "residual interests" interest in the Lower-Tier REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreements, and the interests in any REMIC formed hereby. The following table irrevocably sets forth Middle-Tier REMIC shall hold as assets the designationuncertificated Lower-Tier Interests in the Lower-Tier REMIC, other than the Uncertificated PassClass LT-Through Rate (as defined herein) R Interest, and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are such Lower-Tier Interest is hereby designated as a regular interest in the "regular interests" Lower-Tier REMIC. The Upper-Tier REMIC shall hold as assets the uncertificated Middle-Tier Interests in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii)the Middle-Tier REMIC, the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been Class MT-R Interest, and each such Middle-Tier Interest is hereby designated as a regular interest in the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsMiddle-Tier REMIC.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class III-A-1 Certificates, (iv) the Class III-A-2 Certificates, (v) the Class III-A-3 Certificates, (vi) the Class III-A-4 Certificates, (vii) the Class M-1 Certificates, (viii) the Class M-2 Certificates, (ix) the Class M-3 Certificates, (x) the Class M-4 Certificates, (xi) the Class M-5 Certificates, (xii) the Class M-6 Certificates, (xiii) the Class M-7 Certificates, (xiv) the Class M-8 Certificates, (xv) the Class M-9 Certificates, (xvi) the Class M-10 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R-X Certificates and (xxi) the Class X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Basis Risk Cap Agreement, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, any Servicer Prepayment Charge Payment Amounts, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable (2) $248,047,653.90 February 25, 2037 I-1-B Variable (2) $ 17,276,686.25 February 25, 2037 I-2-B Variable (2) $ 16,629,331.25 February 25, 2037 I-5-B Variable (2) $ 14,987,502.50 February 25, 2037 I-8-B Variable (2) $ 14,181,662.50 February 25, 2037 I-11-B Variable (2) $113,297,597.50 February 25, 2037 I-13-B Variable (2) $ 7,457,386.25 February 25, 2037 I-15-B Variable (2) $ 4,538,531.25 February 25, 2037 I-19-B Variable (2) $ 2,749,255.00 February 25, 2037 I-21-B Variable (2) $ 2,729,768.75 February 25, 2037 I-24-B Variable (2) $ 3,128,412.50 February 25, 2037 I-25-B Variable (2) $ 2,039,992.50 February 25, 2037 I-26-B Variable (2) $ 1,962,206.25 February 25, 2037 I-27-B Variable (2) $ 1,887,561.25 February 25, 2037 I-29-B Variable (2) $ 1,747,165.00 February 25, 2037 I-30-B Variable (2) $ 1,681,166.25 February 25, 2037 I-38-B Variable (2) $ 1,239,547.50 February 25, 2037 I-39-B Variable (2) $ 1,193,711.25 February 25, 2037 I-40-B Variable (2) $ 1,149,673.75 February 25, 2037 I-41-B Variable (2) $ 1,107,361.25 February 25, 2037 I-42-A Variable (2) $ 1,066,702.50 February 25, 2037 I-42-B Variable (2) $ 1,066,702.50 February 25, 2037 I-43-B Variable (2) $ 1,027,631.25 February 25, 2037 I-44-A Variable (2) $ 990,077.50 February 25, 2037 I-44-B Variable (2) $ 990,077.50 February 25, 2037 I-45-A Variable (2) $ 974,156.25 February 25, 2037 I-45-B Variable (2) $ 974,156.25 February 25, 2037 I-47-B Variable (2) $ 3,458,390.00 February 25, 2037 I-48-B Variable (2) $ 3,019,526.25 February 25, 2037 I-49-A Variable (2) $ 585,267.50 February 25, 2037 I-49-B Variable (2) $ 585,267.50 February 25, 2037 I-50-A Variable (2) $ 566,808.75 February 25, 2037 I-50-B Variable (2) $ 566,808.75 February 25, 2037 I-51-B Variable (2) $ 17,964,221.25 February 25, 2037 P Variable (2) $ 100.00 February 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates (vii) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class C Certificates, (xvii) the Class P Certificates, (xviii) the Class L Certificates, (xix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, any Servicer Prepayment Charge Payment Amounts, the Supplemental Interest Trust, the Cap Trust, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, the Interest Rate Swap Agreement and the Basis Risk Cap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the Uncertificated REMIC 1 Regular Interests shall be certificated. I Regular Interests.Variable(2) $ 19,384,106.76 July 25, 2037 I-1-B Variable(2) $ 6,557,468.75 July 25, 2037 I-2-B Variable(2) $ 7,253,362.50 July 25, 2037 I-3-B Variable(2) $ 7,904,693.75 July 25, 2037 I-5-B Variable(2) $ 8,722,982.50 July 25, 2037 I-6-B Variable(2) $ 8,403,283.75 July 25, 2037 I-7-B Variable(2) $ 8,095,431.25 July 25, 2037 I-8-A Variable(2) $ 7,798,982.50 July 25, 2037 I-8-B Variable(2) $ 7,798,982.50 July 25, 2037 I-9-B Variable(2) $ 7,513,512.50 July 25, 2037 I-10-B Variable(2) $ 7,238,608.75 July 25, 2037 I-11-B Variable(2) $ 6,973,878.75 July 25, 2037 I-12-B Variable(2) $ 6,723,572.50 July 25, 2037 I-13-B Variable(2) $ 6,585,537.50 July 25, 2037 I-14-B Variable(2) $ 7,155,693.75 July 25, 2037 I-15-B Variable(2) $ 7,670,536.25 July 25, 2037 I-16-A Variable(2) $ 24,687,383.75 July 25, 2037 I-16-B Variable(2) $ 24,687,383.75 July 25, 2037 I-17-B Variable(2) $ 38,433,310.00 July 25, 2037 I-18-A Variable(2) $ 7,056,627.50 July 25, 2037 I-18-B Variable(2) $ 7,056,627.50 July 25, 2037 I-19-A Variable(2) $ 6,307,856.25 July 25, 2037 I-19-B Variable(2) $ 6,307,856.25 July 25, 2037 I-20-B Variable(2) $ 4,860,090.00 July 25, 2037 I-21-B Variable(2) $ 2,923,642.50 July 25, 2037 I-22-B Variable(2) $ 2,806,013.75 July 25, 2037 I-23-B Variable(2) $ 2,692,933.75 July 25, 2037 I-24-B Variable(2) $ 2,597,712.50 July 25, 2037 I-25-A Variable(2) $ 2,480,571.25 July 25, 2037 I-25-B Variable(2) $ 2,480,571.25 July 25, 2037 I-26-A Variable(2) $ 2,423,417.50 July 25, 2037 I-26-B Variable(2) $ 2,423,417.50 July 25, 2037 I-27-A Variable(2) $ 2,350,566.25 July 25, 2037 I-27-B Variable(2) $ 2,350,566.25 July 25, 2037 I-28-A Variable(2) $ 2,508,573.75 July 25, 2037 I-28-B Variable(2) $ 2,508,573.75 July 25, 2037 I-29-A Variable(2) $ 2,684,417.50 July 25, 2037 I-29-B Variable(2) $ 2,684,417.50 July 25, 2037 I-30-B Variable(2) $ 1,978,863.75 July 25, 2037 I-31-B Variable(2) $ 1,901,186.25 July 25, 2037 I-32-B Variable(2) $ 1,826,721.25 July 25, 2037 I-33-A Variable(2) $ 1,755,327.50 July 25, 2037 I-33-B Variable(2) $ 1,755,327.50 July 25, 2037 I-34-A Variable(2) $ 1,686,877.50 July 25, 2037 I-34-B Variable(2) $ 1,686,877.50 July 25, 2037 I-35-B Variable(2) $ 1,621,236.25 July 25, 2037 I-36-B Variable(2) $ 1,558,266.25 July 25, 2037 I-38-B Variable(2) $ 1,440,020.00 July 25, 2037 I-39-B Variable(2) $ 1,384,495.00 July 25, 2037 I-40-B Variable(2) $ 1,331,230.00 July 25, 2037 I-41-B Variable(2) $ 1,280,130.00 July 25, 2037 I-42-A Variable(2) $ 1,231,102.50 July 25, 2037 I-42-B Variable(2) $ 1,231,102.50 July 25, 2037 I-43-A Variable(2) $ 1,184,062.50 July 25, 2037 I-43-B Variable(2) $ 1,184,062.50 July 25, 2037 I-44-A Variable(2) $ 1,138,925.00 July 25, 2037 I-44-B Variable(2) $ 1,138,925.00 July 25, 2037 I-45-A Variable(2) $ 1,095,606.25 July 25, 2037 I-45-B Variable(2) $ 1,095,606.25 July 25, 2037 I-47-A Variable(2) $ 1,014,128.75 July 25, 2037 I-47-B Variable(2) $ 1,014,128.75 July 25, 2037 I-48-A Variable(2) $ 975,823.75 July 25, 2037 I-48-B Variable(2) $ 975,823.75 July 25, 2037 I-49-A Variable(2) $ 939,051.25 July 25, 2037 I-49-B Variable(2) $ 939,051.25 July 25, 2037 I-50-A Variable(2) $ 903,898.75 July 25, 2037 I-50-B Variable(2) $ 903,898.75 July 25, 2037 I-51-A Variable(2) $ 869,992.50 July 25, 2037 I-51-B Variable(2) $ 869,992.50 July 25, 2037 I-52-A Variable(2) $ 984,020.00 July 25, 2037 I-52-B Variable(2) $ 984,020.00 July 25, 2037 I-53-B Variable(2) $ 1,169,007.50 July 25, 2037 I-54-B Variable(2) $ 752,202.50 July 25, 2037 I-55-A Variable(2) $ 724,487.50 July 25, 2037 I-55-B Variable(2) $ 724,487.50 July 25, 2037 I-56-A Variable(2) $ 697,857.50 July 25, 2037 I-56-B Variable(2) $ 697,857.50 July 25, 2037 I-57-A Variable(2) $ 672,265.00 July 25, 2037 I-57-B Variable(2) $ 672,265.00 July 25, 2037 I-58-A Variable(2) $ 647,668.75 July 25, 2037 I-58-B Variable(2) $ 647,668.75 July 25, 2037 I-59-B Variable(2) $ 624,021.25 July 25, 2037 I-60-A Variable(2) $ 601,275.00 July 25, 2037 I-60-B Variable(2) $ 601,275.00 July 25, 2037 I-61-B Variable(2) $ 579,431.25 July 25, 2037 I-62-A Variable(2) $ 558,430.00 July 25, 2037 I-62-B Variable(2) $ 558,430.00 July 25, 2037 I-63-A Variable(2) $ 538,236.25 July 25, 2037 I-63-B Variable(2) $ 538,236.25 July 25, 2037 I-64-A Variable(2) $ 518,817.50 July 25, 2037 I-64-B Variable(2) $ 518,817.50 July 25, 2037 I-65-B Variable(2) $ 500,143.75 July 25, 2037 I-66-A Variable(2) $ 14,206,067.50 July 25, 2037 I-66-B Variable(2) $ 14,206,067.50 July 25, 2037 P Variable(2) $ 100.00 July 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class M-1 Certificates, (v) the Class M-2 Certificates, (vi) the Class M-3 Certificates, (vii) the Class M-4 Certificates, (viii) the Class M-5 Certificates, (ix) the Class M-6 Certificates, (x) the Class M-7 Certificates, (xi) the Class M-8 Certificates, (xii) the Class M-9 Certificates, (xiii) the Class B-1 Certificates, (xiv) the Class B-2 Certificates, (xv) the Class P Certificates, (xvi) the Class X-1 Certificates, (xvii) the Class X-2 Certificates, (xviii) the Class X-S Certificates and (xix) the Class A-R Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Account, Basis Risk Reserve Fund, Swap Account, the Capitalized Interest Account, the Supplemental Interest Trust and the Subsequent Mortgage Loan Interest) as a REMIC real estate mortgage investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated “regular interests” in REMIC I 1 (the “REMIC 1 Regular Interests”). None of the REMIC 1 Regular Interests will be certificated. The latest possible maturity date (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely determined for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for of each of the Uncertificated REMIC I 1 Regular Interests.Interests will be the Latest Possible Maturity Date as defined herein. LTI-1 Variable(1) $ 471,360,959.55 LTI-PF Variable(1) $ 53,889,040.00 LTI-AR Variable(1) $ 100.00 LTI-P Variable(1) $ 100.00 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-BU1 Mortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates BU1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of nineteen classes of certificates, designated as (i) the Underlying Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificate, (v) the Class 2A-1C Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class R Certificates, (xvi) the Class R-II Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates and (other than xix) the Underlying Group V Class ES Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund and the Class ES Distributable Amount (the “Excluded Trust Property”)) comprises two REMICs in a tiered REMIC structure – the “Lower-Tier REMIC” and the “Upper-Tier REMIC”. Each Certificate, other than the Class R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.08. The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund. The Class R-II Certificate represents the sole class of residual interest in Lower-Tier REMIC I"and the Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC. The Lower-Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue interests (the “Lower-Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower-Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower-Tier REMIC. The Trustee will hold the Lower-Tier Regular Interests as assets of the Upper-Tier REMIC. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for the Lower-Tier REMIC and the Upper-Tier REMIC is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, interest rate, and initial principal balance of each Lower-Tier Interest in the Uncertificated PassLower-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for Tier REMIC, each of which, other than the Uncertificated REMIC I Regular Interests (as defined herein), which are LT-R Lower-Tier Interest) is hereby designated as a regular interest in the "regular interests" in Lower-Tier REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), (the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated “Lower-Tier REMIC I Regular Interests.): LT-Group 1 (1) (4) N/A LT-SC1 (1) (5) N/A LT-Group 2 (2) (6) N/A LT-SC2 (2) (7) N/A LT-1A1A (3) (8) 1A-1A LT-1A1B (3) (8) 1A-1B LT-2A1A (3) (8) 2A-1A LT-2A1B (3) (8) ▇▇-▇▇ ▇▇-▇▇▇▇ (3) (8) 2A-1C LT-M1 (3) (8) M1 LT-M2 (3) (8) M2 LT-M3 (3) (8) M3 LT-M4 (3) (8) M4 LT-M5 (3) (8) M5 LT-M6 (3) (8) M6 LT-M7 (3) (8) M7 LT-M8 (3) (8) M8 LT-M9 (3) (8) M9 LT-Q (3) (9) N/A LT-R (10) (10) N/A

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8ASAP2, Asset Backed Pass-Through Certificates (the “Certificates”). The Certificates will consist of twenty classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Series 2006-ASAP2, Asset Backed Pass-Through Certificates, dated as of March 1, 2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, ▇▇▇▇▇ Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Ocwen Loan Servicing, LLC as servicer (the “Servicer”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1 Certificates and, the Class A-2A, Class I-A-1A-2B, Class IA-2C and Class A-2D Certificates (collectively, the “Class A-2 Certificates”) and the Class ▇-A-2▇, Class II-A-1, Class II-A-2, Cl▇▇▇▇▇ ▇-▇▇-A-1, Class III-A-2M-3, Class IV-A-1M-4, Class IV-A-2M-5, Class V-A-1aM-6, Class V-A-1bM-7, Class V-A-1cM-8, Class V-A-2M-9, Class V-A-3M-10, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 M-11 and Class R M-12 Certificates representing (collectively, the “Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as of June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated March 21, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. Capitalized terms used but not defined herein shall have the meanings set forth in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Pooling and Servicing Agreement. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) parties hereto agree as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass‑through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A Certificates, (ii) the Class II-A1 Certificates, (iii) the Class II-A2 Certificates, (iv) the Class II-A3 Certificates, (v) the Class II‑A4 Certificates, (vi) the Class M‑1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M‑4 Certificates, (x) the Class M‑5 Certificates, (xi) the Class M‑6 Certificates, (xii) the Class M‑7 Certificates, (xiii) the Class M‑8 Certificates, (xiv) the Class M‑9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class M-11 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R‑CX Certificates and (xxi) the Class R‑PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R‑1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and REMIC 1 Pass‑Through Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiiSection 1.860G‑1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass‑Through Rate Rate Change Date Assumed Final Maturity Date1 IX3 $ 79,407,255.53 Variable2 N/A October 2046 I-1-B 1,612,141.83 Variable2 October 2046 I-3-B 2,079,661.25 Variable2 October 2046 I-4-B 2,349,300.89 Variable2 October 2046 I-5-A 583,177.56 Variable2 March 2007 October 2046 I-5-B 583,177.56 Variable2 October 2046 I-6-B 908,650.37 Variable2 October 2046 I-7-B 1,341,068.76 Variable2 October 2046 I-11-B 4,674,942.23 Variable2 October 2046 I-12-B 4,943,644.18 Variable2 October 2046 I-13-A 4,956,009.49 Variable2 November 2007 October 2046 I-13-B 4,956,009.49 Variable2 October 2046 I-15-B 4,720,417.05 Variable2 October 2046 I-16-B 4,615,823.05 Variable2 October 2046 I-17-B 4,264,581.42 Variable2 October 2046 I-18-A 4,064,442.09 Variable2 April 2008 October 2046 I-18-B 4,064,442.09 Variable2 October 2046 I-19-B 5,085,838.81 Variable2 October 2046 I-20-B 4,783,135.91 Variable2 October 2046 I-21-A 4,502,185.40 Variable2 July 2008 October 2046 I-21-B 4,502,185.40 Variable2 October 2046 I-22-B 40,653,543.84 Variable2 October 2046 I-23-B 5,747,066.39 Variable2 October 2046 I-24-B 6,179,696.49 Variable2 October 2046 I-25-B 5,081,635.45 Variable2 October 2046 I-26-B 3,904,432.47 Variable2 October 2046 I-27-A 3,204,257.97 Variable2 January 2009 October 2046 I-27-B 3,204,257.97 Variable2 October 2046 I-28-B 2,749,939.14 Variable2 October 2046 I-29-A 2,423,822.08 Variable2 March 2009 October 2046 I-29-B 2,423,822.08 Variable2 October 2046 I-30-A 2,015,598.38 Variable2 April 2009 October 2046 I-30-B 2,015,598.38 Variable2 October 2046 I-33-A 1,722,790.50 Variable2 July 2009 October 2046 I-33-B 1,722,790.50 Variable2 October 2046 I-34-A 2,156,000.02 Variable2 August 2009 October 2046 I-34-B 2,156,000.02 Variable2 October 2046 I-35-A 2,158,847.97 Variable2 September 2009 October 2046 I-35-B 2,158,847.97 Variable2 October 2046 I-36-A 828,662.58 Variable2 October 2009 October 2046 I-36-B 828,662.58 Variable2 October 2046 I-38-A 1,655,638.83 Variable2 December 2009 October 2046 I-38-B 1,655,638.83 Variable2 October 2046 I-39-A 1,579,247.12 Variable2 January 2010 October 2046 I-39-B 1,579,247.12 Variable2 October 2046 I-40-A 1,501,957.78 Variable2 February 2010 October 2046 I-40-B 1,501,957.78 Variable2 October 2046 I-41-A 1,452,907.55 Variable2 March 2010 October 2046 I-41-B 1,452,907.55 Variable2 October 2046 I-42-A 1,324,958.19 Variable2 April 2010 October 2046 I-42-B 1,324,958.19 Variable2 October 2046 I-43-A 1,264,783.73 Variable2 May 2010 October 2046 I-43-B 1,264,783.73 Variable2 October 2046 I-44-A 1,061,814.03 Variable2 June 2010 October 2046 I-44-B 1,061,814.03 Variable2 October 2046 I-45-A 1,009,863.74 Variable2 July 2010 October 2046 I-45-B 1,009,863.74 Variable2 October 2046 I-46-A 970,812.76 Variable2 August 2010 October 2046 I-46-B 970,812.76 Variable2 October 2046 I-47-A 1,071,498.16 Variable2 September 2010 October 2046 I-47-B 1,071,498.16 Variable2 October 2046 I-48-B 1,098,816.35 Variable2 October 2046 I-49-A 1,042,665.46 Variable2 November 2010 October 2046 I-49-B 1,042,665.46 Variable2 October 2046 I-50-A 1,000,139.71 Variable2 December 2010 October 2046 I-50-B 1,000,139.71 Variable2 October 2046 I-51-A 924,875.76 Variable2 January 2011 October 2046 I-51-B 924,875.76 Variable2 October 2046 I-52-A 856,477.29 Variable2 February 2011 October 2046 I-52-B 856,477.29 Variable2 October 2046 I-53-A 811,551.11 Variable2 March 2011 October 2046 I-53-B 811,551.11 Variable2 October 2046 I-54-A 835,189.67 Variable2 April 2011 October 2046 I-54-B 835,189.67 Variable2 October 2046 I-55-A 871,345.48 Variable2 May 2011 October 2046 I-55-B 871,345.48 Variable2 October 2046 I-56-A 789,561.43 Variable2 June 2011 October 2046 I-56-B 789,561.43 Variable2 October 2046 I-57-A 725,447.76 Variable2 July 2011 October 2046 I-57-B 725,447.76 Variable2 October 2046 I-58-A 649,402.77 Variable2 August 2011 October 2046 I-58-B 649,402.77 Variable2 October 2046 I-59-B 9,575,564.77 Variable2 October 2046 IIX3 164,395,335.87 Variable2 N/A October 2046 II-1-A 3,337,586.67 Variable2 November 2006 October 2046 II-1-B 3,337,586.67 Variable2 October 2046 II-2-B 3,740,040.79 Variable2 October 2046 II-3-A 4,305,483.25 Variable2 January 2007 October 2046 II-3-B 4,305,483.25 Variable2 October 2046 II-4-A 4,863,713.11 Variable2 February 2007 October 2046 II-4-B 4,863,713.11 Variable2 October 2046 II-5-A 1,207,341.44 Variable2 March 2007 October 2046 II-5-B 1,207,341.44 Variable2 October 2046 II-6-A 1,881,161.63 Variable2 April 2007 October 2046 II-7-A 2,776,389.24 Variable2 May 2007 October 2046 II-7-B 2,776,389.24 Variable2 October 2046 II-8-A 3,673,836.63 Variable2 June 2007 October 2046 II-8-B 3,673,836.63 Variable2 October 2046 II-9-B 4,697,931.48 Variable2 October 2046 II-10-A 5,951,577.23 Variable2 August 2007 October 2046 II-10-B 5,951,577.23 Variable2 October 2046 II-11-A 9,678,444.27 Variable2 September 2007 October 2046 II-11-B 9,678,444.27 Variable2 October 2046 II-12-A 10,234,732.82 Variable2 October 2007 October 2046 II-12-B 10,234,732.82 Variable2 October 2046 II-13-A 10,260,332.51 Variable2 November 2007 October 2046 II-13-B 10,260,332.51 Variable2 October 2046 II-14-A 10,012,049.30 Variable2 December 2007 October 2046 II-14-B 10,012,049.30 Variable2 October 2046 II-15-A 9,772,589.95 Variable2 January 2008 October 2046 II-15-B 9,772,589.95 Variable2 October 2046 II-16-A 9,556,050.95 Variable2 February 2008 October 2046 II-16-B 9,556,050.95 Variable2 October 2046 II-17-A 8,828,882.08 Variable2 March 2008 October 2046 II-17-B 8,828,882.08 Variable2 October 2046 II-18-A 8,414,537.41 Variable2 April 2008 October 2046 II-18-B 8,414,537.41 Variable2 October 2046 II-19-A 10,529,115.69 Variable2 May 2008 October 2046 II-19-B 10,529,115.69 Variable2 October 2046 II-20-A 9,902,435.59 Variable2 June 2008 October 2046 II-20-B 9,902,435.59 Variable2 October 2046 II-21-A 9,320,789.10 Variable2 July 2008 October 2046 II-21-B 9,320,789.10 Variable2 October 2046 II-22-A 84,164,261.16 Variable2 August 2008 October 2046 II-22-B 84,164,261.16 Variable2 October 2046 II-23-A 11,898,042.61 Variable2 September 2008 October 2046 II-23-B 11,898,042.61 Variable2 October 2046 II-24-A 12,793,708.51 Variable2 October 2008 October 2046 II-24-B 12,793,708.51 Variable2 October 2046 II-25-A 10,520,413.55 Variable2 November 2008 October 2046 II-25-B 10,520,413.55 Variable2 October 2046 II-26-A 8,083,272.53 Variable2 December 2008 October 2046 II-26-B 8,083,272.53 Variable2 October 2046 II-27-A 6,633,714.53 Variable2 January 2009 October 2046 II-27-B 6,633,714.53 Variable2 October 2046 II-28-A 5,693,146.86 Variable2 February 2009 October 2046 II-28-B 5,693,146.86 Variable2 October 2046 II-29-A 5,017,992.92 Variable2 March 2009 October 2046 II-29-B 5,017,992.92 Variable2 October 2046 II-30-A 4,172,855.12 Variable2 April 2009 October 2046 II-30-B 4,172,855.12 Variable2 October 2046 II-31-B 3,948,211.75 Variable2 October 2046 II-32-A 3,746,151.26 Variable2 June 2009 October 2046 II-32-B 3,746,151.26 Variable2 October 2046 II-33-A 3,566,660.50 Variable2 July 2009 October 2046 II-33-B 3,566,660.50 Variable2 October 2046 II-34-A 4,463,525.98 Variable2 August 2009 October 2046 II-34-B 4,463,525.98 Variable2 October 2046 II-35-A 4,469,422.03 Variable2 September 2009 October 2046 II-35-B 4,469,422.03 Variable2 October 2046 II-36-A 1,715,564.42 Variable2 October 2009 October 2046 II-36-B 1,715,564.42 Variable2 October 2046 II-37-A 3,077,098.69 Variable2 November 2009 October 2046 II-37-B 3,077,098.69 Variable2 October 2046 II-38-A 3,427,637.67 Variable2 December 2009 October 2046 II-38-B 3,427,637.67 Variable2 October 2046 II-39-A 3,269,485.38 Variable2 January 2010 October 2046 II-39-B 3,269,485.38 Variable2 October 2046 II-40-A 3,109,474.72 Variable2 February 2010 October 2046 II-40-B 3,109,474.72 Variable2 October 2046 II-41-A 3,007,926.95 Variable2 March 2010 October 2046 II-41-B 3,007,926.95 Variable2 October 2046 II-42-A 2,743,035.81 Variable2 April 2010 October 2046 II-42-B 2,743,035.81 Variable2 October 2046 II-43-A 2,618,457.77 Variable2 May 2010 October 2046 II-43-B 2,618,457.77 Variable2 October 2046 II-44-A 2,198,253.47 Variable2 June 2010 October 2046 II-44-B 2,198,253.47 Variable2 October 2046 II-45-A 2,090,701.76 Variable2 July 2010 October 2046 II-45-B 2,090,701.76 Variable2 October 2046 II-46-B 2,009,855.24 Variable2 October 2046 II-47-A 2,218,302.34 Variable2 September 2010 October 2046 II-47-B 2,218,302.34 Variable2 October 2046 II-48-A 2,274,858.65 Variable2 October 2010 October 2046 II-48-B 2,274,858.65 Variable2 October 2046 II-49-A 2,158,610.54 Variable2 November 2010 October 2046 II-49-B 2,158,610.54 Variable2 October 2046 II-50-A 2,070,570.29 Variable2 December 2010 October 2046 II-50-B 2,070,570.29 Variable2 October 2046 II-51-A 1,914,752.74 Variable2 January 2011 October 2046 II-51-B 1,914,752.74 Variable2 October 2046 II-52-A 1,773,148.71 Variable2 February 2011 October 2046 II-52-B 1,773,148.71 Variable2 October 2046 II-53-A 1,680,138.89 Variable2 March 2011 October 2046 II-53-B 1,680,138.89 Variable2 October 2046 II-54-A 1,729,077.33 Variable2 April 2011 October 2046 II-54-B 1,729,077.33 Variable2 October 2046 II-55-A 1,803,930.02 Variable2 May 2011 October 2046 II-55-B 1,803,930.02 Variable2 October 2046 II-56-A 1,634,614.07 Variable2 June 2011 October 2046 II-56-B 1,634,614.07 Variable2 October 2046 II-57-A 1,501,880.74 Variable2 July 2011 October 2046 II-57-B 1,501,880.74 Variable2 October 2046 II-58-A 1,344,446.23 Variable2 August 2011 October 2046 II-58-B 1,344,446.23 Variable2 October 2046 II-59-A 19,824,110.23 Variable2 September 2011 October 2046 II-59-B 19,824,110.23 Variable2 October 2046 1 Solely for purposes of Section 1.860G‑1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass‑Through Rate” herein. 3 REMIC 1 Regular Interest IX will be entitled to all prepayment penalties or charges with respect to the Group I Mortgage Loans; REMIC 1 Regular Interest IIX will be entitled to all prepayment penalties or charges with respect to the Group II Mortgage Loans. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests and certain other related assets subject to this Agreement (exclusive of the Reserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as “REMIC 2.” The Class R‑2 Interest shall represent the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 2 Pass-Through Rate, the initial Uncertificated Principal Balance, and solely for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 2 Regular Interests. None of the REMIC 2 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC I 2 Pass-Through Rate Assumed Final Maturity Date1 AA $676,556,260.58 Variable2 October 2046 A-IA 1,830,455.00 Variable2 October 2046 A-IIA1 1,613,940.00 Variable2 October 2046 A-IIA2 624,645.00 Variable2 October 2046 A-IIA3 1,184,640.00 Variable2 October 2046 A-IIA4 365,890.00 Variable2 October 2046 M1 217,465.00 Variable2 October 2046 M2 196,755.00 Variable2 October 2046 M3 124,265.00 Variable2 October 2046 M4 110,460.00 Variable2 October 2046 M5 107,005.00 Variable2 October 2046 M6 96,650.00 Variable2 October 2046 M7 69,035.00 Variable2 October 2046 M8 55,230.00 Variable2 October 2046 M9 51,775.00 Variable2 October 2046 M10 44,875.00 Variable2 October 2046 M11 69,035.00 Variable2 October 2046 ZZ 7,045,150.62 Variable2 October 2046 1GRP 44,970.71 Variable2 October 2046 1SUB 8,361.61 Variable2 October 2046 2GRP 93,102.00 Variable2 October 2046 2SUB 17,319.70 Variable2 October 2046 Swap IO N/A3 Variable2 October 2046 FMR IO N/A4 Variable2 October 2046 XX 690,199,777.19 Variable2 October 2046 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each REMIC 2 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 2 Pass-Through Rate” herein. 3 REMIC 2 Regular Interest Swap IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of the REMIC 1 Regular Interests with the designation “A”. 4 REMIC 2 Regular Interest FMR IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of all of the REMIC 1 Regular Interests. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 2 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 3.” The Class R‑3 Interest represents the sole class of “residual interests” in REMIC 3 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 3 and each class of uncertificated “regular interests” in REMIC 3: Class Designation Original Class Certificate Principal Balance Pass-Through Rate Assumed Final Maturity Date1 I‑A $366,091,000.00 Variable2 October 2046 II-A1 322,788,000.00 Variable2 October 2046 II-A2 124,929,000.00 Variable2 October 2046 II-A3 236,928,000.00 Variable2 October 2046 II-A4 73,178,000.00 Variable2 October 2046 M‑1 43,493,000.00 Variable2 October 2046 M‑2 39,351,000.00 Variable2 October 2

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8HE3, Class IAsset Backed Pass-A-1Through Certificates (the “Certificates”). The Certificates will consist of nineteen classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Class ISeries 2006-A-2HE3, Class IIAsset Backed Pass-A-1Through Certificates, Class II-A-2dated as of June 1, Cl2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, ▇▇▇▇▇ ▇▇▇-A-1Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Ocwen Loan Servicing LLC as servicer (the “Servicer”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1 Certificates , Class III-A-2A-2A, Class IV-A-1A-2B, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 A-2C and Class R A-2D Certificates representing in (collectively, the aggregate the entire beneficial ownership the Trust (as defined herein“Class A Certificates”), the primary assets of which are the Underlying Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6, Class M-7, Class M-8, Class M-9, Class M-10 and Class M-11 Certificates (collectively, the “Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as of June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated June 21, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. Capitalized terms used but not defined herein)herein shall have the meanings set forth in the Pooling and Servicing Agreement. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) parties hereto agree as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-four classes of certificates, designated as (i) the Class I-A1 Certificates, (ii) the Class I-A2 Certificates, (iii) the Class I-A3 Certificates, (iv) the Class I-A4 Certificates, (v) the Class II-A1 Certificates, (vi) the Class II-A2A Certificates, (vii) the Class II-A2B Certificates, (viii) the Class II-A3 Certificates, (ix) the Class M-1 Certificates, (x) the Class M-2 Certificates, (xi) the Class M-3 Certificates, (xii) the Class M-4 Certificates, (xiii) the Class M-5 Certificates, (xiv) the Class M-6 Certificates, (xv) the Class M-7 Certificates, (xvi) the Class M-8 Certificates, (xvii) the Class M-9 Certificates, (xviii) the Class B-1 Certificates, (xix) the Class B-2 Certificates, (xx) the Class C Certificates, (xxi) the Class P Certificates, (xxii) the Class R Certificates, (xxiii) the Class R-CX Certificates and (xxiv) the Class R-PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Account, the Final Maturity Reserve Account and the Master Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the Uncertificated REMIC I 1 Regular Interests.. None of the REMIC 1 Regular Interests will be certificated. A $ 1,972,131,206.45 ▇▇▇▇▇▇▇▇(▇) ▇/▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇-▇ $ 93,233,510.00 ▇▇▇▇▇▇▇▇(▇) ▇/▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇-▇ $ 31,660,652.55 ▇▇▇▇▇▇▇▇(▇) ▇/▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇-▇ $ 70,343,800.00 ▇▇▇▇▇▇▇▇(▇) ▇/▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇-▇ $ 23,887,738.16 Variable(2) N/A November, 2045 P $ 100.00 Variable(2) N/A November, 2045

PRELIMINARY STATEMENT. The Trustee on behalf of Through this Agreement, the Trust will execute and deliver Depositor intends to sell the Bear Stearns Structured Products Inc. TrustCertificates to be issued hereunder in multiple classes, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing which in the aggregate will evidence the entire beneficial ownership interest in the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Fund created hereunder. The Depositor intends to sell some or all Certificates will consist of nine classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A Certificates, (iii) the Class A-R Certificate, (iv) the Class B-1 Certificates, (v) the Class B-2 Certificates, (vi) the Class B-3 Certificates, (vii) the Class B-4 Certificates, (viii) the Class B-5 Certificates and (ix) the Class B-6 Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated as "REMIC I"a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). For purposes of the REMIC ProvisionsEach Certificate, Component I of other than the Class A-R Certificates will Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. The Class A-R Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund and the interests in any REMIC formed hereby. The Upper Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial Class Principal Amount for each Class of Lower-Through Tier REMIC Interest: Class Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Corresponding Class of Certificates LT-Group 1 (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 518,524,152.53 N/A LT-SC-1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 285,355.08 N/A LT-Group 2 (other than the Underlying Group V Certificates2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 347,396,052.52 N/A LT-SC-2 (2) $ 191,182.35 N/A LT-R (3) (3) Class A-R __________________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) and the Swap Agreement (as hereinafter defined) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 2007-R8SL1, Class IAsset Backed Pass-A-1Through Certificates (the “Certificates”). The Certificates will consist of sixteen classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Class ISeries 2007-A-2SL1, Class IIAsset Backed Pass-A-1Through Certificates, Class II-A-2dated as of February 1, Cl2007 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, W▇▇▇▇ ▇▇▇-A-1Fargo Bank, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 National Association as master servicer (the “Master Servicer”) and Class R Certificates representing in securities administrator (the aggregate the entire beneficial ownership the Trust (as defined herein“Securities Administrator”), Ocwen Loan Servicing, LLC as a servicer (“Ocwen”), GMAC Mortgage, LLC as a servicer (“GMAC”, together with Ocwen, the primary assets of which are “Servicers”, each a “Servicer”) and HSBC Bank USA, National Association as trustee (the Underlying Certificates (as defined herein“Trustee”). The Depositor intends to Purchaser will sell some or all of the Class A-1 Certificate, Class A-2 Certificates. REMIC I As provided herein, the Trustee Class M-1 Certificates, Class M-2 Certificates, Class M-3 Certificates, Class M-4 Certificates, Class M-5 Certificates, Class M-6 Certificates, Class M-7 Certificates and Class M-8 Certificates (collectively, the “Publicly Offered Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as of June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated March 1, 2007 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. The Purchaser will elect to treat sell the segregated pool of assets contained Class M-9 Certificates and the Class M-10 Certificates (together, the “Privately Offered Certificates”; together with the Publicly Offered Certificates, the “Offered Certificates”). Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountPooling and Servicing Agreement. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (parties hereto agree as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class M-11 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, the Serivicer Prepayment Charge Payment Amounts, the Supplemental Interest Trust and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 23,368,468.55 June 25, 2036 I-1-A Variable(2) $ 14,947,947.76 June 25, 2036 I-1-B Variable(2) $ 14,947,947.76 June 25, 2036 I-2-B Variable(2) $ 18,206,619.69 June 25, 2036 I-3-A Variable(2) $ 21,430,120.35 June 25, 2036 I-3-B Variable(2) $ 21,430,120.35 June 25, 2036 I-4-B Variable(2) $ 24,586,949.30 June 25, 2036 I-5-A Variable(2) $ 27,644,591.42 June 25, 2036 I-5-B Variable(2) $ 27,644,591.42 June 25, 2036 I-6-A Variable(2) $ 30,569,941.12 June 25, 2036 I-6-B Variable(2) $ 30,569,941.12 June 25, 2036 I-7-A Variable(2) $ 33,329,213.37 June 25, 2036 I-7-B Variable(2) $ 33,329,213.37 June 25, 2036 I-8-A Variable(2) $ 35,869,612.36 June 25, 2036 I-8-B Variable(2) $ 35,869,612.36 June 25, 2036 I-9-B Variable(2) $ 35,825,178.19 June 25, 2036 I-10-B Variable(2) $ 34,211,367.51 June 25, 2036 I-11-A Variable(2) $ 32,606,785.36 June 25, 2036 I-11-B Variable(2) $ 32,606,785.36 June 25, 2036 I-12-A Variable(2) $ 31,078,587.49 June 25, 2036 I-12-B Variable(2) $ 31,078,587.49 June 25, 2036 I-13-A Variable(2) $ 29,623,103.40 June 25, 2036 I-13-B Variable(2) $ 29,623,103.40 June 25, 2036 I-14-A Variable(2) $ 28,236,839.95 June 25, 2036 I-14-B Variable(2) $ 28,236,839.95 June 25, 2036 I-15-A Variable(2) $ 26,916,472.83 June 25, 2036 I-15-B Variable(2) $ 26,916,472.83 June 25, 2036 I-16-A Variable(2) $ 25,658,838.31 June 25, 2036 I-16-B Variable(2) $ 25,658,838.31 June 25, 2036 I-17-B Variable(2) $ 24,460,925.51 June 25, 2036 I-18-A Variable(2) $ 23,322,864.40 June 25, 2036 I-18-B Variable(2) $ 23,322,864.40 June 25, 2036 I-19-A Variable(2) $ 22,292,650.47 June 25, 2036 I-19-B Variable(2) $ 22,292,650.47 June 25, 2036 I-20-B Variable(2) $ 50,202,495.98 June 25, 2036 I-21-A Variable(2) $ 59,556,700.53 June 25, 2036 I-21-B Variable(2) $ 59,556,700.53 June 25, 2036 I-22-B Variable(2) $ 50,144,642.55 June 25, 2036 I-23-B Variable(2) $ 41,724,602.71 June 25, 2036 I-24-A Variable(2) $ 22,598,774.85 June 25, 2036 I-24-B Variable(2) $ 22,598,774.85 June 25, 2036 I-25-A Variable(2) $ 12,625,657.12 June 25, 2036 I-25-B Variable(2) $ 12,625,657.12 June 25, 2036 I-26-A Variable(2) $ 11,625,530.54 June 25, 2036 I-26-B Variable(2) $ 11,625,530.54 June 25, 2036 I-27-A Variable(2) $ 10,992,212.62 June 25, 2036 I-27-B Variable(2) $ 10,992,212.62 June 25, 2036 I-28-B Variable(2) $ 10,394,642.02 June 25, 2036 I-29-A Variable(2) $ 9,832,240.18 June 25, 2036 I-29-B Variable(2) $ 9,832,240.18 June 25, 2036 I-30-A Variable(2) $ 9,301,839.51 June 25, 2036 I-30-B Variable(2) $ 9,301,839.51 June 25, 2036 I-31-B Variable(2) $ 8,801,561.89 June 25, 2036 I-32-A Variable(2) $ 8,329,646.18 June 25, 2036 I-32-B Variable(2) $ 8,329,646.18 June 25, 2036 I-33-A Variable(2) $ 7,884,377.73 June 25, 2036 I-33-B Variable(2) $ 7,884,377.73 June 25, 2036 I-34-A Variable(2) $ 7,463,327.34 June 25, 2036 I-34-B Variable(2) $ 7,463,327.34 June 25, 2036 I-35-A Variable(2) $ 7,066,978.71 June 25, 2036 I-35-B Variable(2) $ 7,066,978.71 June 25, 2036 I-36-B Variable(2) $ 6,693,019.96 June 25, 2036 I-37-B Variable(2) $ 6,340,055.33 June 25, 2036 I-38-A Variable(2) $ 6,006,865.12 June 25, 2036 I-38-B Variable(2) $ 6,006,865.12 June 25, 2036 I-39-A Variable(2) $ 5,692,295.39 June 25, 2036 I-39-B Variable(2) $ 5,692,295.39 June 25, 2036 I-40-A Variable(2) $ 5,395,220.53 June 25, 2036 I-40-B Variable(2) $ 5,395,220.53 June 25, 2036 I-41-A Variable(2) $ 5,114,738.26 June 25, 2036 I-41-B Variable(2) $ 5,114,738.26 June 25, 2036 I-42-A Variable(2) $ 103,709,744.93 June 25, 2036 I-42-B Variable(2) $ 103,709,744.93 June 25, 2036 ________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 6 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. REMIC I The Certificates will consist of thirty-eight classes of certificates, designated as (i) the Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificates, (v) the Class 3A-1A Certificates, (vi) the Class 3A-1B Certificates, (vii) the Class 4A-1A Certificates, (viii) the Class 4A-1B Certificates, (ix) the Class 5A-1A Certificates, (x) the Class 5A-1B Certificates, (xi) the Class X-1 Certificates, (xii) the Class X-4 Certificates, (xiii) the Class A-R Certificates, (xiv) the Class B-1 Certificates, (xv) the Class B-2 Certificates, (xvi) the Class B-3 Certificates, (xvii) the Class B-4 Certificates, (xviii) the Class B-5 Certificates and (xix) the Class B-6 Certificates. As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated as "REMIC I"a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC” and the “Upper-Tier REMIC”). For purposes of the REMIC ProvisionsEach Certificate, Component I of other than the Class A-R Certificates will Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. The Class A-R Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund, other than the interests in the Lower-Tier REMIC and the Middle-Tier REMIC formed hereby. The following table irrevocably sets forth Middle-Tier REMIC shall hold as assets the designationuncertificated Lower-Tier Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC regular interest. The Upper-Tier REMIC shall hold as assets the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii)uncertificated Middle-Tier Interests, the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as the "latest possible maturity date" for each of the Uncertificated a REMIC I Regular Interestsregular interest.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 7 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of fourteen classes of certificates, designated as (i) the Underlying Certificates Class 1A Certificates, (other than ii) the Underlying Group V Class 2A-1A Certificates, (iii) as a REMIC for the Class 2A-1B Certificates, (iv) the Class 2A-1C Certificates, (v) the Class B-1 Certificates, (vi) the Class B-2 Certificates, (vii) Class B-3 Certificates, (viii) the Class B-4 Certificates, (ix) the Class B-5 Certificates, (x) the Class B-6 Certificates, (xi) the Class B-7 Certificates, (xii) the Class C Certificates, (xiii) the Class P Certificates, (xiv) the Class R Certificates. For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Trust, the Yield Maintenance Account, the Yield Maintenance Agreement, the Final Maturity Reserve Trust and the Final Maturity Reserve Account (the “Excluded Trust Property”)) comprises two REMICs in a tiered REMIC structure—the “Lower-Tier REMIC” and the “Upper-Tier REMIC.” Each Certificate, other than the Class R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates also represent the right to receive (i) payments in respect of the Final Maturity Reserve Account, (ii) payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 and (ii) payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 5.01(h). The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Final Maturity Reserve Account, the Final Maturity Reserve Trust, the Yield Maintenance Trust, and the Yield Maintenance Account. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC. The Lower-Tier REMIC I"will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue interests (the “Lower-Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower-Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower-Tier REMIC. The Trustee will hold the Lower-Tier Regular Interests as assets of the Upper-Tier REMIC. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for the Lower-Tier REMIC and the Upper-Tier REMIC is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, interest rate, and initial principal balance of each Lower-Tier Interest in the Uncertificated PassLower-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for Tier REMIC, each of which, other than the Uncertificated REMIC I Regular Interests (as defined herein), which are LT-R Lower-Tier Interest) is hereby designated as a regular interest in the "regular interests" in Lower-Tier REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), (the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I “Lower-Tier Regular Interests.): LT-1A (1) $ 378,188,000.00 1A LT-2A-1A (1) $ 343,503,500.00 2A-1A LT-2A-1B (1) $ 143,126,500.00 2A-1B LT-2A-1C (1) $ 85,876,000.00 2A-1C LT-Q (1) $ 1,008,387,422.20 N/A LT-I (2) (2) N/A LT-R (3) (3) N/A

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-6 Mortgage Loan Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 6 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twelve classes of certificates, designated as (i) the Class A-1A Certificates, (ii) the Class A-1B Certificates, (iii) the Class X Certificates, (iv) the Class A-R Certificates, (v) the Class B-1 Certificates, (vi) the Class B-2 Certificates, (vii) the Class B-3 Certificates, (viii) the Class B-4 Certificates, (ix) the Class B-5 Certificates, (x) the Class B-6 Certificates, (xi) the Class P Certificate and (xii) the Class A-R-II Certificate. REMIC I As provided herein, the Trustee will shall elect that the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account and the Yield Maintenance Agreement and payments made with respect to treat Prepayment Premiums) be treated for federal income tax purposes as comprising two real estate mortgage investment conduits (each, a “REMIC” or, in the segregated pool alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class P, Class A-R-II and Class A-R Certificates, shall represent ownership of assets contained a regular interest in the Upper-Tier REMIC, as described herein. The Class P Certificate represents an interest in the Trust Fund consisting but does not represent an interest in any REMIC created hereunder. In addition, (i) the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 and from the Yield Maintenance Account as provided in Section 4.04. The owners of the Underlying Class X Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificate represents the sole class of residual interest in the Upper-Tier REMIC. The Class A-R-II Certificate represents the sole class of residual interest in the Lower-Tier REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund (other than the Underlying Group V Certificatesassets held in the Basis Risk Reserve Fund, the Yield Maintenance Account and the Yield Maintenance Agreement) and the interests in any REMIC formed hereby. The Upper-Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountregular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial Class Principal Amount for each Class of Lower-Through Tier REMIC Interest: Lower-Tier REMIC Class Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Class Principal Balance Corresponding Class of Certificates Class LT-A-1A (as defined herein1) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 2) A-1 Class LT-A-1B (other than the Underlying Group V Certificates1) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.(2) A-2 Class LT-B-1 (1) (2) B-1 Class LT-A-R (1) (2) A-R Class LT-B-2 (1) (2) B-2 Class LT-B-3 (1) (2) B-3 Class LT-B-4 (1) (2) B-4 Class LT-B-5 (1) (2) B-5 Class LT-B-6 (1) (2) B-6 Class LT-R (3) (3) N/A __________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of seventeen classes of certificates, designated as (i) the Underlying Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificates, (v) the Class 2A-1C1 Certificates, (vi) the Class 2A-1C2 Certificates, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates, (xii) the Class B-6 Certificates, (xiii) the Class B-7 Certificates, (xiv) the Class B-8 Certificates, (xv) the Class C Certificates, (xvi) the Class P Certificates and (other than xvii) the Underlying Group V Class R Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Trust, the Yield Maintenance Trust Account, the Yield Maintenance Account, the Yield Maintenance Agreement, the Final Maturity Reserve Trust, the Final Maturity Reserve Account and the Collateral Account (the “Excluded Trust Property”)) comprises two REMICs in a tiered REMIC structure: the “Lower-Tier REMIC” and the “Upper-Tier REMIC.” Each Certificate, other than the Class R Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates also represent the right to receive (i) payments from the Final Maturity Reserve Account, (ii) payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 and (iii) payments in respect of Basis Risk Shortfalls as provided in Section 5.01(h). The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Final Maturity Reserve Account, the Final Maturity Reserve Trust, the Yield Maintenance Trust, the Yield Maintenance Trust Account and the Yield Maintenance Account. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC, as well as the sole residual interest in the Lower-Tier REMIC. The Lower-Tier REMIC I"will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue 18 uncertificated interests, 17 of which shall be the “Lower-Tier Regular Interests” and one residual interest (the “LT-R Interest”), which will represent the sole class of residual interest in the Lower-Tier REMIC. The Upper-Tier REMIC will hold as its assets all of the Lower-Tier Regular Interests and shall issue the Certificates. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for each REMIC created hereby is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, the Uncertificated Passinterest rate, and initial principal balance of each Lower-Through Rate (as defined herein) Tier Regular Interest and the initial Uncertificated Principal Balance LT-R Interest: LT-1A-1A (as defined herein1) for each of the Uncertificated REMIC $ 189,733,000.00 1A-1A LT-1A-1B (1) $ 126,488,500.00 1A-1B LT-2A-1A (1) $ 293,857,000.00 2A-1A LT-2A-1B (1) $ 122,440,000.00 2A-1B LT-2A-1C1 (1) $ 25,000,000.00 2A-1C1 LT-2A-1C2 (1) $ 48,464,000.00 2A-1C2 LT- B-1 (1) $ 24,301,000.00 B-1 LT- B-2 (1) $ 14,400,500.00 ▇-▇ ▇▇-▇-▇ (1) $ 8,550,500.00 ▇-▇ ▇▇-▇-▇ (1) $ 11,250,000.00 ▇-▇ ▇▇-▇-▇ (1) $ 9,000,500.00 ▇-▇ ▇▇-▇-▇ (1) $ 9,450,500.00 ▇-▇ ▇▇-▇-▇ (1) $ 7,200,500.00 ▇-▇ ▇▇-▇-▇ (1) $ 5,400,000.00 B-8 LT-P (1) $ 50.00 P LT-Q (1) $ 904,536,259.69 N/A LT-I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 2) (other than the Underlying Group V Certificates2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.N/A LT-R (3) (3) N/A

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass‑through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A Certificates, (ii) the Class II-A1 Certificates, (iii) the Class II-A2 Certificates, (iv) the Class II-A3 Certificates, (v) the Class II‑A4 Certificates, (vi) the Class M‑1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M‑4 Certificates, (x) the Class M‑5 Certificates, (xi) the Class M‑6 Certificates, (xii) the Class M‑7 Certificates, (xiii) the Class M‑8 Certificates, (xiv) the Class M‑9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class B Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R‑CX Certificates and (xxi) the Class R‑PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R‑1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and REMIC 1 Pass‑Through Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiiSection 1.860G‑1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass‑Through Rate Rate Change Date Assumed Final Maturity Date1 IX3 $76,414,071.06 Variable2 N/A December 2046 I-5-B 383,696.98 Variable2 December 2046 I-6-B 637,294.15 Variable2 December 2046 I-7-B 932,708.98 Variable2 December 2046 I-13-B 3,740,251.85 Variable2 December 2046 I-20-B 2,646,246.86 Variable2 December 2046 I-23-B 4,834,504.15 Variable2 December 2046 I-24-B 5,173,758.71 Variable2 December 2046 I-25-B 4,255,081.30 Variable2 December 2046 I-26-A 3,276,601.33 Variable2 February 2009 December 2046 I-26-B 3,276,601.33 Variable2 December 2046 I-27-A 2,696,345.95 Variable2 March 2009 December 2046 I-27-B 2,696,345.95 Variable2 December 2046 I-29-B 2,015,277.41 Variable2 December 2046 I-35-A 279,556.88 Variable2 November 2009 December 2046 I-35-B 279,556.88 Variable2 December 2046 I-38-A 1,398,727.50 Variable2 February 2010 December 2046 I-38-B 1,398,727.50 Variable2 December 2046 I-39-A 1,316,615.34 Variable2 March 2010 December 2046 I-39-B 1,316,615.34 Variable2 December 2046 I-41-B 1,190,632.29 Variable2 December 2046 I-42-A 1,103,817.96 Variable2 June 2010 December 2046 I-42-B 1,103,817.96 Variable2 December 2046 I-44-A 929,160.54 Variable2 August 2010 December 2046 I-44-B 929,160.54 Variable2 December 2046 I-45-A 894,250.67 Variable2 September 2010 December 2046 I-45-B 894,250.67 Variable2 December 2046 I-47-B 929,130.63 Variable2 December 2046 I-48-B 959,391.73 Variable2 December 2046 I-49-A 905,256.00 Variable2 January 2011 December 2046 I-49-B 905,256.00 Variable2 December 2046 I-50-A 863,544.27 Variable2 February 2011 December 2046 I-50-B 863,544.27 Variable2 December 2046 I-51-A 923,470.03 Variable2 March 2011 December 2046 I-51-B 923,470.03 Variable2 December 2046 I-52-A 844,356.87 Variable2 April 2011 December 2046 I-52-B 844,356.87 Variable2 December 2046 I-53-B 789,040.70 Variable2 December 2046 I-54-B 790,303.57 Variable2 December 2046 I-55-A 708,832.91 Variable2 July 2011 December 2046 I-55-B 708,832.91 Variable2 December 2046 I-56-A 642,949.40 Variable2 August 2011 December 2046 I-56-B 642,949.40 Variable2 December 2046 I-57-A 591,224.58 Variable2 September 2011 December 2046 I-57-B 591,224.58 Variable2 December 2046 I-58-A 528,942.03 Variable2 October 2011 December 2046 I-58-B 528,942.03 Variable2 December 2046 IIX3 138,177,628.52 Variable2 N/A December 2046 II-3-B 2,896,969.33 Variable2 December 2046 II-5-B 693,829.52 Variable2 December 2046 II-6-B 1,152,402.85 Variable2 December 2046 II-7-B 1,686,594.02 Variable2 December 2046 II-8-B 2,224,305.11 Variable2 December 2046 II-10-B 3,743,184.86 Variable2 December 2046 II-11-B 6,264,815.82 Variable2 December 2046 II-13-B 6,763,402.65 Variable2 December 2046 II-14-B 6,542,388.13 Variable2 December 2046 II-15-B 6,334,222.82 Variable2 December 2046 II-17-B 5,648,418.34 Variable2 December 2046 II-18-A 5,365,337.38 Variable2 June 2008 December 2046 II-18-B 5,365,337.38 Variable2 December 2046 II-19-A 5,054,768.90 Variable2 July 2008 December 2046 II-19-B 5,054,768.90 Variable2 December 2046 II-20-A 4,785,141.14 Variable2 August 2008 December 2046 II-20-B 4,785,141.14 Variable2 December 2046 II-21-A 2,927,415.62 Variable2 September 2008 December 2046 II-21-B 2,927,415.62 Variable2 December 2046 II-22-B 52,985,851.24 Variable2 December 2046 II-23-B 8,742,111.35 Variable2 December 2046 II-24-B 9,355,576.79 Variable2 December 2046 II-25-A 7,694,355.70 Variable2 January 2009 December 2046 II-25-B 7,694,355.70 Variable2 December 2046 II-26-B 5,924,995.17 Variable2 December 2046 II-27-A 4,875,734.05 Variable2 March 2009 December 2046 II-27-B 4,875,734.05 Variable2 December 2046 II-28-A 4,185,506.88 Variable2 April 2009 December 2046 II-28-B 4,185,506.88 Variable2 December 2046 II-29-A 3,644,175.09 Variable2 May 2009 December 2046 II-29-B 3,644,175.09 Variable2 December 2046 II-30-A 3,091,225.23 Variable2 June 2009 December 2046 II-30-B 3,091,225.23 Variable2 December 2046 II-31-B 2,897,846.34 Variable2 December 2046 II-33-B 2,661,166.46 Variable2 December 2046 II-34-B 3,598,504.20 Variable2 December 2046 II-35-A 505,515.62 Variable2 November 2009 December 2046 II-35-B 505,515.62 Variable2 December 2046 II-36-B 5,018,453.05 Variable2 December 2046 II-37-B 2,644,369.44 Variable2 December 2046 II-38-A 2,529,283.50 Variable2 February 2010 December 2046 II-38-B 2,529,283.50 Variable2 December 2046 II-39-A 2,380,802.16 Variable2 March 2010 December 2046 II-39-B 2,380,802.16 Variable2 December 2046 II-40-A 2,260,950.32 Variable2 April 2010 December 2046 II-40-B 2,260,950.32 Variable2 December 2046 II-41-A 2,152,990.21 Variable2 May 2010 December 2046 II-41-B 2,152,990.21 Variable2 December 2046 II-42-A 1,996,006.04 Variable2 June 2010 December 2046 II-42-B 1,996,006.04 Variable2 December 2046 II-43-A 1,888,554.29 Variable2 July 2010 December 2046 II-43-B 1,888,554.29 Variable2 December 2046 II-44-B 1,680,177.46 Variable2 December 2046 II-45-B 1,617,050.83 Variable2 December 2046 II-47-B 1,680,123.37 Variable2 December 2046 II-48-A 1,734,843.77 Variable2 December 2010 December 2046 II-48-B 1,734,843.77 Variable2 December 2046 II-49-A 1,636,951.50 Variable2 January 2011 December 2046 II-49-B 1,636,951.50 Variable2 December 2046 II-50-A 1,561,525.23 Variable2 February 2011 December 2046 II-50-B 1,561,525.23 Variable2 December 2046 II-51-A 1,669,887.47 Variable2 March 2011 December 2046 II-51-B 1,669,887.47 Variable2 December 2046 II-52-A 1,526,829.13 Variable2 April 2011 December 2046 II-52-B 1,526,829.13 Variable2 December 2046 II-53-B 1,426,802.30 Variable2 December 2046 II-55-A 1,281,764.59 Variable2 July 2011 December 2046 II-55-B 1,281,764.59 Variable2 December 2046 II-56-A 1,162,629.10 Variable2 August 2011 December 2046 II-56-B 1,162,629.10 Variable2 December 2046 II-57-A 1,069,096.42 Variable2 September 2011 December 2046 II-57-B 1,069,096.42 Variable2 December 2046 II-58-A 956,472.47 Variable2 October 2011 December 2046 II-58-B 956,472.47 Variable2 December 2046 II-59-B 14,069,015.07 Variable2 December 2046 1 Solely for purposes of Section 1.860G‑1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass‑Through Rate” herein. 3 REMIC 1 Regular Interest IX will be entitled to all prepayment penalties or charges with respect to the Group I Mortgage Loans; REMIC 1 Regular Interest IIX will be entitled to all prepayment penalties or charges with respect to the Group II Mortgage Loans. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests and certain other related assets subject to this Agreement (exclusive of the Reserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as “REMIC 2.” The Class R‑2 Interest shall represent the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 2 Pass-Through Rate, the initial Uncertificated Principal Balance, and solely for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 2 Regular Interests. None of the REMIC 2 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC I 2 Pass-Through Rate Assumed Final Maturity Date1 AA $494,017,938.05 Variable2 December 2046 A-IA 1,441,900.00 Variable2 December 2046 A-IIA1 1,064,015.00 Variable2 December 2046 A-IIA2 476,050.00 Variable2 December 2046 A-IIA3 788,800.00 Variable2 December 2046 A-IIA4 274,640.00 Variable2 December 2046 M1 161,310.00 Variable2 December 2046 M2 153,750.00 Variable2 December 2046 M3 93,260.00 Variable2 December 2046 M4 83,175.00 Variable2 December 2046 M5 80,655.00 Variable2 December 2046 M6 75,615.00 Variable2 December 2046 M7 70,575.00 Variable2 December 2046 M8 42,850.00 Variable2 December 2046 M9 40,330.00 Variable2 December 2046 M10 30,245.00 Variable2 December 2046 B 50,410.00 Variable2 December 2046 ZZ 5,154,418.74 Variable2 December 2046 1GRP 35,901.04 Variable2 December 2046 1SUB 7,063.04 Variable2 December 2046 2GRP 64,918.95 Variable2 December 2046 2SUB 12,848.85 Variable2 December 2046 Swap IO N/A3 Variable2 December 2046 FMR IO N/A4 Variable2 December 2046 XX 503,979,204.92 Variable2 December 2046 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each REMIC 2 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 2 Pass-Through Rate” herein. 3 REMIC 2 Regular Interest Swap IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of the REMIC 1 Regular Interests with the designation “A”. 4 REMIC 2 Regular Interest FMR IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of all of the REMIC 1 Regular Interests. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 2 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 3.” The Class R‑3 Interest represents the sole class of “residual interests” in REMIC 3 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 3 and each class of uncertificated “regular interests” in REMIC 3: Designation Initial Uncertificated Principal Balance Uncertificated REMIC 2 Pass-Through Rate Assumed Final Maturity Date1 I‑A $288,380,000.00 Variable2 December 2046 II-A1 212,803,000.00 Variable2 December 2046 II-A2 95,210,000.00 Variable2 December 2046 II-A3 157,760,000.00 Variable2 December 2046 II-A4 54,928,000.00 Variable2 December 2046 M‑1 32,262,000.00 Variable2 December 2046 M‑2 30,750,000.00 Variable2 December 2046 M‑3 18,652,000.00 Variable2 December 2046 M‑4 16,635,000.00 Variable2 December 2046 M‑5 16,131,000.00 Variable2 December 2046 M‑6 15,123,000.00 Variable2 December 2046 M‑7 14,115,000.00 Variable2 December 2046 M‑8 8,570,000.00 Variable2 December 2046 M‑9 8,066,000.00 Variable2 December 2046 M-10 6,049,000.00 Variable2 December 2046 B 10,082,000.00 Variable2 December 2046 Swap IO N/A Variable5 December 2046 FM Reserve IO N/A Variable5 December 2046 Class C Interest3 22,683,773.58 Variable2 December 2046 Class P Interest $100.00 N/A4 December 2046 ___________________ 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each Class of Certificates or uncertificated interests that represents one or more of the “regular interests” in REMIC 3. 2 Calculated in accordance with the definition of “Pass-Through Rate” herein. 3 The Class C Interest will accrue interest at its variable Pass-Through Rate on its Notional Amount outstanding from time to time, which shall equal the aggregate of the Uncertificated Principal Balances of the REMIC 2 Regular Interests. The Class C Interest will not accrue interest on its Uncertificated Principal Balance. 4 The Class P Interest will not accrue interest. 5 The interests designated “Swap IO” and “FM Reserve IO” will not have principal amounts or interest rates but will be entitled to 100% of the interest paid on REMIC 2 Regular Interests Swap IO and FMR IO, respectively. These interests will not be certificated.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-1 Mortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-three classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 1-A1B Certificates, (iii) the Class 2-A1A Certificates, (iv) the Class 2-A1B Certificates, (v) the Class 2-A1C Certificates, (vi) the Class X-1 Certificates, (vii) the Class X-2A1B Certificates, (viii) the Class PO-1 Certificates, (ix) the Class PO-2A1B Certificates, (x) the Class A-R Certificates, (xi) the Class B-1 Certificates, (xii) the Class B-2 Certificates, (xiii) the Class B-3 Certificates, (xiv) the Class B-4 Certificates, (xv) the Class B-5 Certificates, (xvi) the Class B-6 Certificates, (xvii) the Class B-7 Certificates, (xviii) the Class B-8 Certificates, (xix) the Class B-9 Certificates, (xx) the Class B-10 Certificates, (xxi) the Class B-11 Certificates, (xxii) the Class B-12 Certificates and (xxiii) the Class A-R-II Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates assets held in the Basis Risk Reserve Fund (other than the Underlying Group V Certificates“Excluded Trust Property”)) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R and Class A-R-II Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, the MTA and LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class X-1 and Class X-2A1B Certificates beneficially own the Basis Risk Reserve Fund. The Class A-R-II Certificate represents ownership of the sole class of residual interest in the Lower-Tier REMIC, and the Class A-R Certificates will represent ownership of the sole class of "residual interests" interest in the Middle-Tier and the Upper-Tier REMICs. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund, other than the Excluded Trust Property and the Lower-Tier REMIC Interests and the Middle-Tier REMIC Interests. The following table irrevocably sets forth Middle-Tier REMIC shall hold as assets the designationuncertificated Lower-Tier Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC regular interest. The Upper-Tier REMIC shall hold as assets the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii)uncertificated Middle-Tier Interests, the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as the "latest possible maturity date" for each of the Uncertificated a REMIC I Regular Interestsregular interest.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class M-10 Certificates, (xv) the Class B-1 Certificates, (xvi) the Class B-2 Certificates, (xvii) the Class B-3 Certificates, (xviii) the Class C Certificates, (xix) the Class P Certificates, (xx) the Class R Certificates and (xxi) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, any Servicer Prepayment Charge Payment Amounts, the Cap Contract, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 186,096,599.99 March 25, 2036 I-1-B Variable(2) $ 10,939,343.75 March 25, 2036 I-4-B Variable(2) $ 11,505,936.25 March 25, 2036 I-5-B Variable(2) $ 11,618,112.50 March 25, 2036 I-6-B Variable(2) $ 11,809,545.00 March 25, 2036 I-8-B Variable(2) $ 12,276,161.25 March 25, 2036 I-9-A Variable(2) $ 42,006,962.50 March 25, 2036 I-9-B Variable(2) $ 42,006,962.50 March 25, 2036 I-10-A Variable(2) $ 100,564,707.50 March 25, 2036 I-10-B Variable(2) $ 100,564,707.50 March 25, 2036 I-11-A Variable(2) $ 19,827,321.25 March 25, 2036 I-11-B Variable(2) $ 19,827,321.25 March 25, 2036 I-12-B Variable(2) $ 2,450,530.00 March 25, 2036 I-13-B Variable(2) $ 2,338,713.75 March 25, 2036 I-14-B Variable(2) $ 2,232,358.75 March 25, 2036 I-15-B Variable(2) $ 2,131,183.75 March 25, 2036 I-16-B Variable(2) $ 2,034,917.50 March 25, 2036 I-17-B Variable(2) $ 1,943,306.25 March 25, 2036 I-18-A Variable(2) $ 1,856,112.50 March 25, 2036 I-18-B Variable(2) $ 1,856,112.50 March 25, 2036 I-19-B Variable(2) $ 1,773,107.50 March 25, 2036 I-20-B Variable(2) $ 2,896,131.25 March 25, 2036 I-21-A Variable(2) $ 6,745,461.25 March 25, 2036 I-21-B Variable(2) $ 6,745,461.25 March 25, 2036 I-22-B Variable(2) $ 1,739,076.25 March 25, 2036 I-23-B Variable(2) $ 1,221,613.75 March 25, 2036 I-24-B Variable(2) $ 1,033,476.25 March 25, 2036 I-25-B Variable(2) $ 994,543.75 March 25, 2036 I-26-A Variable(2) $ 957,122.50 March 25, 2036 I-26-B Variable(2) $ 957,122.50 March 25, 2036 I-27-A Variable(2) $ 921,148.75 March 25, 2036 I-27-B Variable(2) $ 921,148.75 March 25, 2036 I-28-B Variable(2) $ 886,565.00 March 25, 2036 I-29-A Variable(2) $ 853,316.25 March 25, 2036 I-29-B Variable(2) $ 853,316.25 March 25, 2036 I-30-A Variable(2) $ 821,346.25 March 25, 2036 I-30-B Variable(2) $ 821,346.25 March 25, 2036 I-31-B Variable(2) $ 790,606.25 March 25, 2036 I-32-A Variable(2) $ 761,043.75 March 25, 2036 I-32-B Variable(2) $ 761,043.75 March 25, 2036 I-33-A Variable(2) $ 732,615.00 March 25, 2036 I-33-B Variable(2) $ 732,615.00 March 25, 2036 I-34-B Variable(2) $ 705,273.75 March 25, 2036 I-35-A Variable(2) $ 678,976.25 March 25, 2036 I-35-B Variable(2) $ 678,976.25 March 25, 2036 I-36-A Variable(2) $ 653,681.25 March 25, 2036 I-36-B Variable(2) $ 653,681.25 March 25, 2036 I-37-B Variable(2) $ 629,350.00 March 25, 2036 I-38-A Variable(2) $ 605,941.25 March 25, 2036 I-38-B Variable(2) $ 605,941.25 March 25, 2036 I-39-A Variable(2) $ 15,833,661.25 March 25, 2036 I-39-B Variable(2) $ 15,833,661.25 March 25, 2036 P Variable(2) $ 100.00 March 25, 2036 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of On August 3, 2006 the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, ClDepositor formed T▇▇▇▇▇▇▇▇ ▇▇▇-A-1Mortgage Securities Trust 2006-4, Class IIIas a Delaware statutory trust (the “Trust”) pursuant to (i) the Trust Agreement, dated as of August 3, 2006 (the “Original Trust Agreement”), among the Depositor, the Trustee and the Delaware Trustee and (ii) a Certificate of Trust filed with the Secretary of State of the State of Delaware on August 3, 2006. The parties to this Agreement desire to amend and restate the Original Trust Agreement in its entirety, and, as evidenced by their signatures hereto, the Original Trust Agreement is hereby amended, restated and replaced in its entirety as of the date first written above by this Agreement. Through this Agreement, the Depositor intends to cause the issuance and sale of the Trust’s Mortgage Pass-A-2Through Certificates, Class IVSeries 2006-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 4 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from the Seller. On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor Certificates evidencing the entire beneficial ownership of the Trust. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained be issued hereunder in multiple classes, which in the Trust Fund consisting aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twelve classes of certificates, designated as (i) the Underlying Class A-1 Certificates, (ii) the Class A-2A Certificates, (iii) the Class A-2B Certificates, (iv) the Class A-2C Certificates, (v) the Class A-X Certificates, (vi) the Class R Certificates, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates and (other than xii) the Underlying Group V Class B-6 Certificates) as a REMIC for . For federal income tax purposes, designated as "REMIC I". For purposes the Trust Fund (exclusive of the Additional Collateral, the Yield Maintenance Agreements, the Auction Swap Agreement, and the Yield Maintenance Account, collectively, the “Excluded Trust Assets”) is comprised of three REMICs in a tiered REMIC Provisionsstructure - REMIC 1 , Component I of REMIC 2 , and the Upper-Tier REMIC. Each Certificate, other than the Class R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. In addition, the Class A-1, Class A-2A, Class A-2B, and Class A-2C Certificates will represent the right to receive payments from the Yield Maintenance Account as provided in Section 5.09. The Class R Certificate represents ownership of the sole class of "residual interests" interest in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsREMIC.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all of the Certificates. REMIC I As provided hereinpass-through certificates (collectively, the Trustee "Certificates"), to be issued hereunder in multiple classes, which in the aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting created hereunder. The Certificates will consist of twelve classes of certificates, designated as (i) the Underlying Class A-1 Certificates, (ii) the Class A-1M Certificates, (iii) the Class A-2 Certificates, (iv) the Class A-2M Certificates, (v) the Class A-R Certificate, (vi) the Class B-1 Certificates, (vii) the Class B-2 Certificates, (viii) the Class B-3 Certificates, (ix) the Class B-4 Certificates, (x) the Class B-5 Certificates, (xi) the Class B-6 Certificates and (other than xii) the Underlying Group V Certificates) as a REMIC for Class X Certificate. For federal income tax purposes, designated as "REMIC I". For purposes the Trust Fund (exclusive of the Additional Collateral and the Carryover Reserve Fund) will consist of three REMICs. REMIC Provisions, Component I 1 will consist of all of the Class R Certificates will represent ownership assets constituting the Trust Fund (exclusive of the sole class of "residual interests" in REMIC I. Component I of Additional Collateral and the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined hereinCarryover Reserve Fund) and will be evidenced by the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as will be uncertificated and will represent the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), 1) and the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated R-1 Interest as the single "latest possible maturity dateresidual interest" for each in REMIC 1. REMIC 2 will consist of the Uncertificated REMIC I 1 Regular Interests and will be evidenced by the REMIC 2 Regular Interests (which will be uncertificated and will represent the "regular interests" in REMIC 2) and the R-2 Interest as the single "residual interest" in REMIC 2. The Trustee will hold the REMIC 1 regular interests and the REMIC 2 Regular Interests.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the Luminent Mortgage Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-4’s Mortgage Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 4 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. REMIC I The Certificates will consist of fourteen classes of certificates, designated as (i) the Class A1A Certificates, (ii) the Class A1B Certificates, (iii) the Class A1C Certificates, (iv) the Class X Certificates, (v) the Class PO Certificates, (vi) the Class A-R Certificates, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates, (xii) the Class B-6 Certificates, (xiii) the Class P Certificates and (xiv) the Class ES Certificates. As provided herein, the Trustee will elect to treat the segregated pool of assets contained in an election shall be made that the Trust Fund consisting (exclusive of the Underlying Certificates assets held in the Basis Risk Reserve Fund and the Class ES Distributable Amount (other than the Underlying Group V Certificates“Excluded Trust Property”)) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R and Class ES Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class X Certificates beneficially own the Basis Risk Reserve Fund. The Class A-R Certificates will represent Certificate represents ownership of the sole class of "residual interests" interest in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated Lower-Tier REMIC I Regular Interests (and the Upper-Tier REMIC. The Lower-Tier REMIC shall hold as defined herein)assets all property of the Trust Fund, which are other than the Excluded Trust Property and the Lower-Tier REMIC Interests. The Upper-Tier REMIC shall hold as assets the uncertificated Lower-Tier Interests, other than the Class LT-R Interest. Each such Lower-Tier Interest is hereby designated as the "a REMIC regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interestsinterest.

PRELIMINARY STATEMENT. The Trustee on behalf of Company intends to sell mortgage pass-through certificates (collectively, the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust"Certificates"), Series 2007-R8to be issued hereunder in multiple classes, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing which in the aggregate will evidence the entire beneficial ownership interest in the Mortgage Loans (as defined herein). As provided herein, the REMIC Administrator will make an election to treat the entire segregated pool of assets described in the definition of Trust Fund (as defined herein), and subject to this Agreement (including the primary assets of which are Mortgage Loans but excluding the Underlying Certificates Initial Monthly Payment Fund), as a real estate mortgage investment conduit (as defined herein). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the a "REMIC") for federal income tax purposes and such segregated pool of assets contained will be designated as the "REMIC." The Class A-1, Class A-2, Class A-3, Class A-4, Class A-5, Class A-6, Class A-7, Class A-8, Class A-9, Class A-10, Class A-11, Class A-12, Class A-13, Class M-1, Class M-2, Class M-3, Class B-1, Class B-2 and Class B-3 Certificates and the Uncertificated REMIC Regular Interests will be "regular interests" in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of and the Class R Certificates will represent ownership of be the sole class of "residual interests" in REMIC I. Component I the Trust Fund in each case for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The Class R A-14 Certificates will not bear represent the entire beneficial ownership interest or have a principal amountin the Uncertificated REMIC Regular Interests. The following table irrevocably sets forth the designation, the Uncertificated type, Pass-Through Rate (as defined herein) Rate, aggregate Initial Certificate Principal Balance, Maturity Date, initial ratings and the initial Uncertificated Principal Balance (as defined herein) certain features for each Class of Certificates issued on the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as Closing Date comprising the "regular interests" interests in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsTrust Fund created hereunder.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple Classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of seventeen Classes of Certificates, designated as (i) the Class 1AV-1, Class 2AV-1, Class 2AV-2, Class AF-1, Class AF-2, Class AF-3, Class AF-4, Class AF-5 and Class AF-6 Certificates, (ii) the Class M-1, Class M-2, Class M-3, Class M-4 and Class M-5 Certificates, (iii) the Class M-6 Certificates, (iv) Class N Certificates, (v) Class X Certificates and (vi) Class R Certificates. The Depositor hereby assigns to the Trustee, acting on behalf of the CertificatesCertificateholders its interests and rights in the Mortgage Loans (exclusive of any Arrearage in respect of Delinquent Mortgage Loans). REMIC I As provided herein, the Trustee will elect make multiple elections to treat the segregated pool pools of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC subject to this Agreement for federal income tax purposespurposes as the following five separate real estate mortgage investment conduits (each, designated as a "REMIC"): the Subsidiary REMIC, the Intermediate REMIC, the Master REMIC, the Class M-6 REMIC, and the Class X REMIC. The Subsidiary REMIC I". For purposes will consist of (a) all of the REMIC Provisionsassets constituting the Group 1 Mortgage Loans, Component I (b) all of the Class R Certificates assets constituting the Group 2 Mortgage Loans, and (c) all of the assets constituting the Group 3 Mortgage Loans. The Subsidiary REMIC will issue (1) uncertificated REMIC regular interests designated with an "1-" (the "Subsidiary REMIC Regular Interests"). The Subsidiary REMIC Regular Interests will be uncertificated and will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in the Subsidiary REMIC I. Solely for purposes and the SR Interest will represent the single class of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), "residual interest" in the Distribution Date immediately following Subsidiary REMIC. The Trustee will hold the latest scheduled maturity date Subsidiary REMIC Regular Interests for the Underlying benefit of the Intermediate REMIC. The Intermediate REMIC will consist of the Subsidiary REMIC Regular Interests and will be evidenced by (i) the Intermediate REMIC Regular Interests, which will be uncertificated and will represent the "regular interests" in the Intermediate REMIC and (ii) the IR Interest, which will represent the single class of "residual interest" in the Intermediate REMIC. The Trustee will hold the Intermediate REMIC Regular Interests for the benefit of the Master REMIC. The Master REMIC will consist of the Master REMIC Regular Interests and will be evidenced by (i) the Regular Certificates (other than the Underlying Group V Class M-6, and Class X Certificates) has been designated as ), the Class M-6 Interest, and Class X Interest, which will represent the "latest possible maturity dateregular interests" for each in the Master REMIC and (ii) the Class MR Interest, which will represent the single class of "residual interest" in the Uncertificated REMIC I Regular InterestsMaster REMIC.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-four classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-2M Certificates, (iv) the Class A-3 Certificates, (v) the Class A-3M Certificates, (vi) the Class A-4 Certificates, (vii) the Class A-4M Certificates, (viii) the Class A-5 Certificates, (ix) the Class A-5M Certificates, (x) the Class A-6 Certificates, (xi) the Class A-6M Certificates, (xii) the Class A-7 Certificates, (xiii) the Class M-1 Certificates, (xiv) the Class M-2 Certificates, (xv) the Class M-3 Certificates, (xvi) the Class M-4 Certificates, (xvii) the Class M-5 Certificates, (xviii) the Class M-6 Certificates, (xix) the Class M-7 Certificates, (xx) the Class M-8 Certificates, (xxi) the Class B Certificates, (xxii) Class C Certificates, (xxiii) the Class P Certificates and (xxiv) the Class R Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets (other than the Underlying Group V CertificatesNet WAC Shortfall Reserve Fund, any Master Servicer Prepayment Charge Payment Amounts and, for the avoidance of doubt, the Supplemental Interest Trust, the Swap Account and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of Residual Interests in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-1-A Variable(2) $ 4,035,240.13 November 25, 2036 1-1-B Variable(2) $ 4,035,240.13 November 25, 2036 1-2-A Variable(2) $ 10,270,515.54 November 25, 2036 1-2-B Variable(2) $ 10,270,515.54 November 25, 2036 1-3-A Variable(2) $ 11,473,338.76 November 25, 2036 1-3-B Variable(2) $ 11,473,338.76 November 25, 2036 1-4-A Variable(2) $ 12,664,406.46 November 25, 2036 1-4-B Variable(2) $ 12,664,406.46 November 25, 2036 1-5-A Variable(2) $ 13,828,621.13 November 25, 2036 1-5-B Variable(2) $ 13,828,621.13 November 25, 2036 1-6-A Variable(2) $ 14,831,555.44 November 25, 2036 1-6-B Variable(2) $ 14,831,555.44 November 25, 2036 1-7-A Variable(2) $ 15,937,156.87 November 25, 2036 1-7-B Variable(2) $ 15,937,156.87 November 25, 2036 1-8-A Variable(2) $ 17,006,124.63 November 25, 2036 1-8-B Variable(2) $ 17,006,124.63 November 25, 2036 1-9-A Variable(2) $ 18,441,306.82 November 25, 2036 1-9-B Variable(2) $ 18,441,306.82 November 25, 2036 1-10-A Variable(2) $ 19,805,091.14 November 25, 2036 1-10-B Variable(2) $ 19,805,091.14 November 25, 2036 1-11-A Variable(2) $ 20,784,991.55 November 25, 2036 1-11-B Variable(2) $ 20,784,991.55 November 25, 2036 1-12-A Variable(2) $ 21,363,336.84 November 25, 2036 1-12-B Variable(2) $ 21,363,336.84 November 25, 2036 1-13-A Variable(2) $ 21,951,123.30 November 25, 2036 1-13-B Variable(2) $ 21,951,123.30 November 25, 2036 1-14-A Variable(2) $ 22,485,948.91 November 25, 2036 1-14-B Variable(2) $ 22,485,948.91 November 25, 2036 1-15-A Variable(2) $ 22,965,095.29 November 25, 2036 1-15-B Variable(2) $ 22,965,095.29 November 25, 2036 1-16-A Variable(2) $ 23,374,043.22 November 25, 2036 1-16-B Variable(2) $ 23,374,043.22 November 25, 2036 1-17-A Variable(2) $ 23,537,333.58 November 25, 2036 1-17-B Variable(2) $ 23,537,333.58 November 25, 2036 1-18-A Variable(2) $ 22,778,692.08 November 25, 2036 1-18-B Variable(2) $ 22,778,692.08 November 25, 2036 1-19-A Variable(2) $ 22,043,990.96 November 25, 2036 1-19-B Variable(2) $ 22,043,990.96 November 25, 2036 1-20-A Variable(2) $ 2,907,012.14 November 25, 2036 1-20-B Variable(2) $ 2,907,012.14 November 25, 2036 1-21-A Variable(2) $ 21,206,980.89 November 25, 2036 1-21-B Variable(2) $ 21,206,980.89 November 25, 2036 1-22-A Variable(2) $ 20,979,297.75 November 25, 2036 1-22-B Variable(2) $ 20,979,297.75 November 25, 2036 1-23-A Variable(2) $ 20,274,456.03 November 25, 2036 1-23-B Variable(2) $ 20,274,456.03 November 25, 2036 1-24-A Variable(2) $ 37,985,465.93 November 25, 2036 1-24-B Variable(2) $ 37,985,465.93 November 25, 2036 1-25-A Variable(2) $ 18,319,637.52 November 25, 2036 1-25-B Variable(2) $ 18,319,637.52 November 25, 2036 1-26-A Variable(2) $ 17,682,504.42 November 25, 2036 1-26-B Variable(2) $ 17,682,504.42 November 25, 2036 1-27-A Variable(2) $ 17,068,083.84 November 25, 2036 1-27-B Variable(2) $ 17,068,083.84 November 25, 2036 1-28-A Variable(2) $ 16,197,103.54 November 25, 2036 1-28-B Variable(2) $ 16,197,103.54 November 25, 2036 1-29-A Variable(2) $ 6,771,406.29 November 25, 2036 1-29-B Variable(2) $ 6,771,406.29 November 25, 2036 1-30-A Variable(2) $ 15,069,047.37 November 25, 2036 1-30-B Variable(2) $ 15,069,047.37 November 25, 2036 1-31-A Variable(2) $ 15,342,175.95 November 25, 2036 1-31-B Variable(2) $ 15,342,175.95 November 25, 2036 1-32-A Variable(2) $ 14,775,068.01 November 25, 2036 1-32-B Variable(2) $ 14,775,068.01 November 25, 2036 1-33-A Variable(2) $ 66,967,043.62 November 25, 2036 1-33-B Variable(2) $ 66,967,043.62 November 25, 2036 1-34-A Variable(2) $ 12,086,942.77 November 25, 2036 1-34-B Variable(2) $ 12,086,942.77 November 25, 2036 1-35-A Variable(2) $ 11,638,320.35 November 25, 2036 1-35-B Variable(2) $ 11,638,320.35 November 25, 2036 1-36-A Variable(2) $ 11,206,527.13 November 25, 2036 1-36-B Variable(2) $ 11,206,527.13 November 25, 2036 1-37-A Variable(2) $ 10,337,860.78 November 25, 2036 1-37-B Variable(2) $ 10,337,860.78 November 25, 2036 1-38-A Variable(2) $ 93,446,243.33 November 25, 2036 1-38-B Variable(2) $ 93,446,243.33 November 25, 2036 1-39-A Variable(2) $ 6,656,034.17 November 25, 2036 1-39-B Variable(2) $ 6,656,034.17 November 25, 2036 1-40-A Variable(2) $ 6,453,943.03 November 25, 2036 1-40-B Variable(2) $ 6,453,943.03 November 25, 2036 1-41-A Variable(2) $ 6,257,542.49 November 25, 2036 1-41-B Variable(2) $ 6,257,542.49 November 25, 2036 1-42-A Variable(2) $ 6,067,543.43 November 25, 2036 1-42-B Variable(2) $ 6,067,543.43 November 25, 2036 1-43-A Variable(2) $ 5,882,841.08 November 25, 2036 1-43-B Variable(2) $ 5,882,841.08 November 25, 2036 1-44-A Variable(2) $ 5,704,062.46 November 25, 2036 1-44-B Variable(2) $ 5,704,062.46 November 25, 2036 1-45-A Variable(2) $ 5,530,387.39 November 25, 2036 1-45-B Variable(2) $ 5,530,387.39 November 25, 2036 1-46-A Variable(2) $ 5,362,038.48 November 25, 2036 1-46-B Variable(2) $ 5,362,038.48 November 25, 2036 1-47-A Variable(2) $ 5,198,886.12 November 25, 2036 1-47-B Variable(2) $ 5,198,886.12 November 25, 2036 1-48-A Variable(2) $ 5,040,498.98 November 25, 2036 1-48-B Variable(2) $ 5,040,498.98 November 25, 2036 1-49-A Variable(2) $ 4,887,110.98 November 25, 2036 1-49-B Variable(2) $ 4,887,110.98 November 25, 2036 1-50-A Variable(2) $ 4,738,313.31 November 25, 2036 1-50-B Variable(2) $ 4,738,313.31 November 25, 2036 1-51-A Variable(2) $ 4,594,002.40 November 25, 2036 1-51-B Variable(2) $ 4,594,002.40 November 25, 2036 1-52-A Variable(2) $ 5,378,663.93 November 25, 2036 1-52-B Variable(2) $ 5,378,663.93 November 25, 2036 1-53-A Variable(2) $ 16,032,701.81 November 25, 2036 1-53-B Variable(2) $ 16,032,701.81 November 25, 2036 1-54-A Variable(2) $ 40,875,708.66 November 25, 2036 1-54-B Variable(2) $ 40,875,708.66 November 25, 2036 1-55-A Variable(2) $ 27,320,129.36 November 25, 2036 1-55-B Variable(2) $ 27,320,129.36 November 25, 2036 1-56-A Variable(2) $ 45,157,444.46 November 25, 2036 1-56-B Variable(2) $ 45,157,444.46 November 25, 2036 1-57-A Variable(2) $ 3,082,737.26 November 25, 2036 1-57-B Variable(2) $ 3,082,737.26 November 25, 2036 1-58-A Variable(2) $ 213,945.22 November 25, 2036 1-58-B Variable(2) $ 213,945.22 November 25, 2036 1-59-A Variable(2) $ 207,417.02 November 25, 2036 1-59-B Variable(2) $ 207,417.02 November 25, 2036 1-60-A Variable(2) $ 201,086.53 November 25, 2036 1-60-B Variable(2) $ 201,086.53 November 25, 2036 1-61-A Variable(2) $ 194,947.79 November 25, 2036 1-61-B Variable(2) $ 194,947.79 November 25, 2036 1-62-A Variable(2) $ 188,995.04 November 25, 2036 1-62-B Variable(2) $ 188,995.04 November 25, 2036 1-63-A Variable(2) $ 183,222.66 November 25, 2036 1-63-B Variable(2) $ 183,222.66 November 25, 2036 1-64-A Variable(2) $ 177,625.23 November 25, 2036 1-64-B Variable(2) $ 177,625.23 November 25, 2036 1-65-A Variable(2) $ 172,197.48 November 25, 2036 1-65-B Variable(2) $ 172,197.48 November 25, 2036 1-66-A Variable(2) $ 166,934.29 November 25, 2036 1-66-B Variable(2) $ 166,934.29 November 25, 2036 1-67-A Variable(2) $ 161,830.71 November 25, 2036 1-67-B Variable(2) $ 161,830.71 November 25, 2036 1-68-A Variable(2) $ 156,881.93 November 25, 2036 1-68-B Variable(2) $ 156,881.93 November 25, 2036 1-69-A Variable(2) $ 152,083.28 November 25, 2036 1-69-B Variable(2) $ 152,083.28 November 25, 2036 1-70-A Variable(2) $ 147,430.23 November 25, 2036 1-70-B Variable(2) $ 147,430.23 November 25, 2036 1-71-A Variable(2) $ 142,918.39 November 25, 2036 1-71-B Variable(2) $ 142,918.39 November 25, 2036 1-72-A Variable(2) $ 138,543.52 November 25, 2036 1-72-B Variable(2) $ 138,543.52 November 25, 2036 1-73-A Variable(2) $ 134,301.46 November 25, 2036 1-73-B Variable(2) $ 134,301.46 November 25, 2036 1-74-A Variable(2) $ 130,188.23 November 25, 2036 1-74-B Variable(2) $ 130,188.23 November 25, 2036 1-75-A Variable(2) $ 126,199.93 November 25, 2036 1-75-B Variable(2) $ 126,199.93 November 25, 2036 1-76-A Variable(2) $ 122,332.79 November 25, 2036 1-76-B Variable(2) $ 122,332.79 November 25, 2036 1-77-A Variable(2) $ 118,583.16 November 25, 2036 1-77-B Variable(2) $ 118,583.16 November 25, 2036 1-78-A Variable(2) $ 114,947.49 November 25, 2036 1-78-B Variable(2) $ 114,947.49 November 25, 2036 1-79-A Variable(2) $ 1,417,073.07 November 25, 2036 1-79-B Variable(2) $ 1,417,073.07 November 25, 2036 1-80-A Variable(2) $ 1,590,733.44 November 25, 2036 1-80-B Variable(2) $ 1,590,733.44 November 25, 2036 1-81-A Variable(2) $ 583,900.97 November 25, 2036 1-81-B Variable(2) $ 583,900.97 November 25, 2036 OC Variable(2) $ 19,946,570.47 November 25, 2036 P Variable(2) $ 100.00 November 25, 2036 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple Classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty Classes of Certificates, designated as (i) the Class AV, Class AF-1, Class AF-2, Class AF-3 and Class AF-4 Certificates, (ii) the Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6 and Class M-7 Certificates, (iii) the Class B-1, Class B-2, Class B-3 and Class B-4 Certificates, (iv) the Class P Certificates, (v) the Class CE Certificates, (vi) the Class R Certificates and (vii) the Class R-X Certificates. The Depositor hereby assigns to the Trustee, acting on behalf of the CertificatesCertificateholders its interests and rights in the Mortgage Loans. REMIC I As provided herein, for federal income tax purposes, the Trustee will elect to treat the segregated pool pools of assets contained in the Trust Fund consisting subject to this Agreement (exclusive of the Underlying Certificates (other than Senior Cap Account, the Underlying Group V CertificatesMezzanine Cap Account, the Basis Risk Reserve Fund and the Final Maturity Reserve Fund) as nine real estate mortgage investment conduits (each, a "REMIC"): the Subsidiary REMIC, the Intermediate REMIC, the Master REMIC, the Class ▇▇ ▇▇▇▇▇, the Class P REMIC for federal income tax purposes, designated as "and the four Class B REMICs. The Subsidiary REMIC I". For purposes will consist of (a) all of the REMIC Provisions, Component I assets constituting the Group 1 Mortgage Loans and all of the Class R Certificates assets constituting the Group 2 Mortgage Loans. The Subsidiary REMIC will issue (1) the REMIC regular interests (the "Subsidiary REMIC Regular Interests") and (2) the SR Interest. The Subsidiary REMIC Regular Interests will be uncertificated and will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in the Subsidiary REMIC I. Solely for purposes and the SR Interest will represent the single class of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), "residual interest" in the Distribution Date immediately following Subsidiary REMIC. The Trustee will hold the latest scheduled maturity date Subsidiary REMIC Regular Interests for the Underlying benefit of the Intermediate REMIC. The assets of the Intermediate REMIC will consist of the Subsidiary REMIC Regular Interests and the interests in the Intermediate REMIC will be evidenced by (i) the Intermediate REMIC Regular Interests, which will be uncertificated and will represent the "regular interests" in the Intermediate REMIC and (ii) the IR Interest, which will represent the single class of "residual interest" in the Intermediate REMIC. The Trustee will hold the Intermediate REMIC Regular Interests for the benefit of the Master REMIC. The assets of the Master REMIC will consist of the Intermediate REMIC Regular Interests and the interests in the Master REMIC will be evidenced by (i) the Regular Certificates (other than the Underlying Group V Class CE, Class P and Class B Certificates), the Class CEM Interest, the Class PM Interest and the four Class BM Interests, which will represent the "regular interests" in the Master REMIC and (ii) has been designated as the Class MR Interest, which will represent the single class of "residual interest" in the Master REMIC. The Trustee will hold the Class CEM Interest in the Master REMIC for the benefit of the Class ▇▇ ▇▇▇▇▇. The assets of the Class ▇▇ ▇▇▇▇▇ will consist of the Class CEM Interest in the Master REMIC and interests in the Class ▇▇ ▇▇▇▇▇ will be evidenced by (i) the Class CE Certificate, which will represent the "regular interests" in the Class ▇▇ ▇▇▇▇▇ and (ii) the Class CER-X Interest, which will represent the single class of "residual interest" in the Class ▇▇ ▇▇▇▇▇. The Trustee will hold the Class PM Interest in the Master REMIC for the benefit of the Class P REMIC. The assets of the Class P REMIC will consist of the Class PM Interest in the Master REMIC and interests in the Class P REMIC will be evidenced by (i) the Class P Certificate, which will represent the "regular interests" in the Class P REMIC and (ii) the Class PR-X Interest, which will represent the single class of "residual interest" in the Class P REMIC. The Trustee will hold each Class BM Interest in the Master REMIC for the benefit of a separate Class B REMIC. The assets of each Class B REMIC will consist of a single Class BM Interest in the Master REMIC and interests in each Class B REMIC will be evidenced by (i) a separately numbered Class B Certificate, which will represent the "regular interest" in that Class B REMIC and (ii) a separately numbered, uncertificated Class BR Interest, which will represent the single class of "residual interest" in that Class B REMIC. The Class R Certificates will represent the Class SR, Class IR and Class MR Interests, and the Class R-X Certificates will represent the residual interest in each of the Class ▇▇ ▇▇▇▇▇, Class P REMIC and four Class B REMICs. The "latest possible maturity date" for federal income tax purposes of all REMICs, and regular and residual interests created hereunder will be the Latest Possible Maturity Date. The Subsidiary REMIC -------------------- The Subsidiary REMIC Interests, each of which (except for the Uncertificated Class SR Interests) is hereby designated a REMIC I Regular Interests.regular interest for federal income tax purposes, will have the principal balances, pass-through rates and Corresponding Loan Groups as set forth in the following table:

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 10 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of sixteen classes of certificates, designated as (i) the Underlying Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificates, (v) the Class 2A-1C Certificates, (vi) the Class B-1 Certificates, (vii) the Class B-2 Certificates, (viii) the Class B-3 Certificates, (ix) the Class B-4 Certificates, (x) the Class B-5 Certificates, (xi) the Class B-6 Certificates, (xii) the Class B-7 Certificates, (xiii) the Class C Certificates, (xiv) the Class P Certificates, (xvi) the Class ES Certificates and (other than xvi) the Underlying Group V Class R Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Trust, the Yield Maintenance Trust Account, the Yield Maintenance Account, the Yield Maintenance Agreement, the Final Maturity Reserve Trust and the Final Maturity Reserve Account (the “Excluded Trust Property”)) comprises three REMICs in a tiered REMIC structure: the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC.” Each Certificate, other than the Class R and Class ES Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates also represent the right to receive (i) payments in respect of the Final Maturity Reserve Account, (ii) payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 and (iii) payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 5.01(h). The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Final Maturity Reserve Account, the Final Maturity Reserve Trust, the Yield Maintenance Trust, the Yield Maintenance Trust Account and the Yield Maintenance Account. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC, as well as the sole residual interest in each of the Lower-Tier REMIC I"and the Middle-Tier REMIC. The Lower-Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue three uncertificated interests, two of which shall be the “Lower-Tier Regular Interests” and one residual interest (the “MT-R Interest”), which will represent the sole class of residual interest in the Lower-Tier REMIC. The Middle-Tier REMIC will hold as its assets all of the Lower-Tier Regular Interests and shall issue 15 uncertificated interests, 14 of which shall be the “Middle-Tier Regular Interests” and one residual interest (the “MT-R Interest”), which will represent the sole class of residual interest in the Middle-Tier REMIC. The Upper-Tier REMIC will hold as its assets all of the Middle-Tier Regular Interests and shall issue the Certificates. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for each REMIC created hereby is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, the Uncertificated Passinterest rate, and initial principal balance of each Lower-Through Rate (as defined herein) Tier Regular Interest and the initial Uncertificated Principal Balance MT-R Interest: MT-Initial (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $1,688,875,880.32 MT-Additional (as defined herein1) $ 34,249,553.61 MT-R (1) (1), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.

PRELIMINARY STATEMENT. The Trustee on behalf Pursuant to this Agreement, the Depositor intends to cause the issuance and sale of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust’s Mortgage Pass-Through Certificates, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 4 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from the Seller pursuant to the Mortgage Loan Purchase Agreement (as defined below). On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor the Certificates evidencing the entire beneficial ownership of the Trust. The Depositor intends to sell some and deliver to the Seller or all of its designee the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained be issued hereunder in multiple classes, which in the Trust Fund consisting aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of fourteen classes of certificates, designated as (i) the Underlying Class 1A-1 Certificates, (ii) the Class 1A-2 Certificates, (iii) the Class 2A-1 Certificates, (iv) the Class 2A-2 Certificates, (v) the Class 3A-1 Certificates, (vi) the Class 3A-2 Certificates, (vii) the Class A-R Certificate, (viii) the Class B-1 Certificates, (ix) the Class B-2 Certificates, (x) the Class B-3 Certificates, (xi) the Class B-4 Certificates, (xii) the Class B-5 Certificates, (xiii) the Class B-6 Certificates and (other than xiv) the Underlying Group V Class ES Certificates) as a REMIC for . For federal income tax purposes, designated as "REMIC I". For purposes the Trust Fund (exclusive of the Additional Collateral and the Class ES Distributable Amount, collectively the “Excluded Trust Assets”) is comprised of two REMICs in a tiered REMIC Provisions, Component I structure - the lower tier REMIC (the “Lower Tier REMIC”) and the upper tier REMIC (the “Upper Tier REMIC”). The Lower Tier REMIC will hold as its assets all of the Class R Certificates assets constituting the Trust Fund (exclusive of the Excluded Trust Assets) and will issue interests (the “Lower Tier Regular Interests”) (which will be uncertificated and will represent ownership of the regular interests in the Lower Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of "residual interest in the Lower Tier REMIC. The Trustee will hold the Lower Tier Regular Interests as assets of the Upper Tier REMIC. The Certificates, other than the Class A-R Certificate, will represent “regular interests" ” in the Upper Tier REMIC, and the Class A-R Certificate, will represent the sole class of “residual interest” in the Upper Tier REMIC I. Component I as well as ownership of the Class LT-R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsInterest.

PRELIMINARY STATEMENT. The Trustee on behalf Depositor is the owner of the Trust will execute and deliver Fund that is hereby conveyed to the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing Trustee in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all of return for the Certificates. REMIC I The Trust Fund is being conveyed to the Trustee to create a trust for the benefit of the Certificateholders. As provided herein, the Trustee will elect to treat the segregated pool of assets contained in an election shall be made that the Trust Fund consisting (exclusive of (i) the Underlying Certificates right to receive and the obligation to pay Net Rate Carryover Amounts, (other than ii) the Underlying Group V Certificates1 and Group 2 Carryover Reserve Funds, (iii) as a REMIC the Group 1 Certificate Cap Contract, (iv) the Group 1 Certificate Cap Account, (v) the Group 1 Basis Risk Cap Contract, (vi) the Group 1 Basis Risk Cap Account, (vii) the Group 2 Certificate Cap Contract, (viii) the Group 2 Certificate Cap Account, (ix) the Group 2 Basis Risk Cap Contract, (x) the Group 2 Basis Risk Cap Account, (xi) the Class 2-2A3 Basis Risk Cap Contract, (xii) the Class 2-2A3 Basis Risk Cap Account and (xiii) the Supplemental Interest Trust (collectively, the “Excluded Trust Assets”)) be treated for federal income tax purposespurposes as comprising twelve real estate mortgage investment conduits under Section 860D of the Code (each a “REMIC” or, designated as "in the alternative the “Subsidiary REMIC I"1,” “Middle REMIC 1,” “Master REMIC 1,” the “Class 1-C REMIC,” the “Class 1-1P REMIC,” the “Class 1-2P REMIC,” “Subsidiary REMIC 2,” “Middle-REMIC 2,” “Master REMIC 2,” the “Class 2-C REMIC,” the “Class 2-1P REMIC,” and the “Class 2-2P REMIC.”). For Any inconsistencies or ambiguities in this Agreement or in the administration of this Agreement shall be resolved in a manner that preserves the validity of such REMIC elections. Each Certificate, other than the Class 1-R, Class 1-RX, Class 2-R, Class 2-RX, Class 1-1P, Class 1-2P, Class 2-1P, Class 2-2P, Class 1-C and Class 2-C Certificates, represents ownership of a regular interest in Master REMIC 1 or Master REMIC 2 for purposes of the REMIC Provisions. In addition, Component I of each Certificate, other than the Class 1-R, Class 1-RX, Class 2-R, Class 2-RX, Class 1-1P, Class 1-2P, Class 2-1P, Class 2-2P, Class 1-C and Class 2-C Certificates, represents the right to receive certain payments with respect to Net Rate Carryover Amounts. The Class 1-R Certificates will represent Certificate represents ownership of the sole class Class of "residual interests" interest in each of Subsidiary REMIC I. Component I 1, Middle REMIC 1, and Master REMIC 1 for purposes of the REMIC Provisions. The Class 1-RX Certificate represents ownership of the sole Class of residual interest in each of the Class R Certificates will not bear interest or have a principal amount1-C REMIC, the Class 1-1P REMIC, and the Class 1-2P REMIC for purposes of the REMIC Provisions. The following table irrevocably sets forth Class 2-R Certificate represents ownership of the designationsole Class of residual interest in each of Subsidiary REMIC 2, Middle REMIC 2, and Master REMIC 2 for purposes of the Uncertificated PassREMIC Provisions. The Class 2-Through Rate (as defined herein) and RX Certificate represents ownership of the initial Uncertificated Principal Balance (as defined herein) for sole Class of residual interest in each of the Uncertificated Class 2-C REMIC, the Class 2-1P REMIC, and the Class 2-2P REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsProvisions.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class M-10 Certificates, (xv) the Class C Certificates, (xvi) the Class P Certificates, (xvii) the Class R Certificates and (xviii) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesPre-Funding Account, the Interest Coverage Account, the Net WAC Rate Carryover Reserve Account, the Basis Risk Cap Agreement, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, any Subsequent Mortgage Loan Interest, any Servicer Prepayment Charge Payment Amounts, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I-LT1PF Variable(2) $ 209,896,726.30 November 25, 2▇▇▇ ▇-▇▇▇ Variable(2) $ 100.00 November 25, 2035 ________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of sixteen classes of certificates, designated as (i) the Underlying Class 1A-1A Certificates, (ii) the Class 2A-1A Certificates, (iii) the Class 2A-1B Certificates, (iv) the Class 2A-1C Certificates, (v) the Class 2A-2C Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class C Certificates, (xvi) the Class P Certificates and (other than xvii) the Underlying Group V Class R Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Prefunding Account, the Capitalized Interest Account, the Basis Risk Reserve Fund, the Basis Risk Cap Agreement, the Basis Risk Cap Account, the Basis Risk Cap Replacement Receipts Account, the Yield Maintenance Trust, the Yield Maintenance Trust Account, the Yield Maintenance Account, the Yield Maintenance Agreement, the Collateral Account, the Final Maturity Reserve Trust and the Final Maturity Reserve Account (the “Excluded Trust Property”)) comprises three REMICs in a tiered REMIC structure: the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC.” Each Certificate, other than the Class R Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates also represent the right to receive (i) payments in respect of the Final Maturity Reserve Account, (ii) payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07, (iii) payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 5.01(h), and (iv) payments in respect of Basis Risk Shortfalls from the Basis Risk Cap Account as provided in Section 5.12. The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Basis Risk Cap Account, the Final Maturity Reserve Account, the Final Maturity Reserve Trust, the Yield Maintenance Trust Account, and the Yield Maintenance Account. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC, as well as the sole residual interest in each of the Lower-Tier REMIC I"and the Middle-Tier REMIC. The Lower-Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue five uncertificated interests, four of which shall be the “Lower-Tier Regular Interests” and one residual interest (the “LT-R Interest”), which will represent the sole class of residual interest in the Lower-Tier REMIC. The Middle-Tier REMIC will hold as its assets all of the Lower-Tier Regular Interests and shall issue 19 uncertificated interests, 18 of which shall be the “Middle-Tier Regular Interests” and one residual interest (the “MT-R Interest”), which will represent the sole class of residual interest in the Middle-Tier REMIC. The Upper-Tier REMIC will hold as its assets all of the Middle-Tier Regular Interests and shall issue the Certificates. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for each REMIC created hereby is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, the Uncertificated Passinterest rate, and initial principal balance of each Lower-Through Rate (as defined herein) Tier Regular Interest and the initial Uncertificated Principal Balance LT-R Interest: LT-Initial (as defined herein1) for each of the Uncertificated REMIC (6) LT-Subsequent (2) (7) LT-C (3) (3) LT-I Regular Interests (as defined herein4) (4) LT-R (5) (5), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-4 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 4 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of thirteen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A Certificates, (iii) the Class 3-A Certificates, (iv) the Class X-1 Certificates, (v) the Class X-2 Certificates, (vi) the Class A-R Certificates, (vii) the Class B-1 Certificate, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates, (xii) the Class B-6 Certificates and (xiii) the Class P Certificate. REMIC I As provided herein, the Trustee will shall elect that the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund) be treated for federal income tax purposes as comprising three real estate mortgage investment conduits (each, a “REMIC” or, in the alternative, the “Lower-Tier REMIC”, the “Middle-Tier REMIC”, and the “Upper-Tier REMIC”). Each Certificate, other than the Class P Certificate and the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. In addition, the Class 1-A, Class 2-A, Class 3-A, Class B-1, Class B-2 and Class B-3 Certificates represent the right to treat receive payments in respect of Basis Risk Shortfalls from the segregated pool Basis Risk Reserve Fund as provided in Section 5.07. The owners of assets contained the Class X-1 and Class X-2 Certificates beneficially own the Basis Risk Reserve Fund. The Class P Certificate represents an interest in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a but does not represent an interest in any REMIC for federal income tax purposes, designated as "REMIC I"created hereunder. For purposes of the REMIC Provisions, Component I of the The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, and the interests in any REMIC formed hereby. The Middle-Tier REMIC shall hold as assets the several classes of uncertificated interests of the Lower-Tier REMIC, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Upper Tier REMIC shall hold as assets the uncertificated Middle-Tier REMIC Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Class Principal Balance (as defined herein) Amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: Lower Tier REMIC Class LT-Group 1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 53,441,196.55 Group1 Class LT-SC1 (other than the Underlying 1) $ 34,758.55 Group V Certificates1 Class LT-Group 2 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 256,523,495.79 Group 2 Class LT-SC2 (2) $ 166,853.49 Group 2 Class LT-Group 3 (3) $ 290,860,283.53 Group 3 Class LT-SC3 (3) $ 189,184.68 Group 3 Class LT-R (4) (4) N/A __________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which Certificates in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of six classes of certificates, designated as (i) the Class A-1 Certificates , (ii) the Class A-2 Certificates, (iii) the Class M Certificates, (iv) the Class B Certificates, (v) the Class C Certificates and (vi) the Class R Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesExcess Reserve Fund Account, the Swap Account and the Interest Rate Swap Agreement) as a REMIC real estate mortgage investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the Uncertificated REMIC I 1 Regular Interests.. None of the REMIC 1 Regular Interests will be certificated. LTA Variable(2) $ 7,875,000.00 October 25, 2010 LTB Variable(2) $ 95,000,000.00 October 25, 2010 LTC Variable(2) $ 147,125,000.00 October 25, 2010 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of ten classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class S-1 Certificates, (iv) the Class S-2 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class P Certificates, (ix) the Class C Certificates and (x) the Class R Certificates. REMIC I 1A As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Group I Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund and Master Servicer Prepayment Charge Payment Amounts) as a REMIC real estate mortgage investment conduit (a "REMIC") for federal income tax purposes, and such segregated pool of assets will be designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the 1A." The Class R Certificates R-1A Interest will represent ownership of the sole class of "residual interests" in REMIC I. Component I 1A for purposes of the Class R Certificates will not bear interest or have a principal amountREMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1A Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the REMIC 1A Regular Interests. None of the REMIC 1A Regular Interests will be certificated. Uncertificated REMIC I Regular Interests.1A Initial Uncertificated Assumed Final Designation Pass-Through Rate Principal Balance Maturity Date(1) ----------- ----------------------- ---------------------- ---------------- LT1A-1 Variable(2) $615,010,107.00 September 2031 LT1A-2 Variable(2) $68,334,000.00 September 2031 LT1A-P Variable(2) $100.00 September 2031 -------------------------

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A Certificates, (ii) the Class II-A1 Certificates, (iii) the Class II-A2 Certificates, (iv) the Class II-A3 Certificates, (v) the Class II-A4 Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class C Certificates, (xvi) the Class P Certificates, (xvii) the Class R Certificates, (xviii) the Class R-CX Certificates and (xix) the Class R-PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass-Through Rate Assumed Final Maturity Date1 IX $129,509,320.86 Variable2 May 25, 2047 I-1-A $ 1,955,190.52 Variable2 May 25, 2047 I-1-B $ 1,955,190.52 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ I-2-B $ 2,478,702.37 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ I-3-B $ 2,936,857.68 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ I-4-B $ 3,383,948.09 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ I-5-B $ 1,086,748.06 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ ▇-▇-▇ $ 1,533,744.66 Variable2 May 25, 2047 I-6-B $ 1,533,744.66 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ ▇-▇-▇ $ 1,933,650.21 Variable2 May 25, 2047 I-7-B $ 1,933,650.21 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ ▇-▇-▇ $ 2,365,426.69 Variable2 May 25, 2047 I-8-B $ 2,365,426.69 ▇▇▇▇▇▇▇▇▇ ▇▇▇ ▇▇, ▇▇▇▇ I-9-B $ 3,103,020.97 Variable2 May 25, 2047 I-10-B $ 4,330,930.90 Variable2 May 25, 2047 I-11-A $ 5,518,260.80 Variable2 May 25, 2047 I-11-B $ 5,518,260.80 Variable2 May 25, 2047 I-12-A $ 5,812,419.67 Variable2 May 25, 2047 I-12-B $ 5,812,419.67 Variable2 May 25, 2047 I-13-A $ 5,579,166.42 Variable2 May 25, 2047 I-13-B $ 5,579,166.42 Variable2 May 25, 2047 I-14-A $ 5,259,276.62 Variable2 May 25, 2047 I-14-B $ 5,259,276.62 Variable2 May 25, 2047 I-15-A $ 4,946,674.17 Variable2 May 25, 2047 I-15-B $ 4,946,674.17 Variable2 May 25, 2047 I-16-A $ 4,677,720.88 Variable2 May 25, 2047 I-16-B $ 4,677,720.88 Variable2 May 25, 2047 I-17-A $ 4,478,668.50 Variable2 May 25, 2047 I-17-B $ 4,478,668.50 Variable2 May 25, 2047 I-18-A $ 4,273,483.34 Variable2 May 25, 2047 I-18-B $ 4,273,483.34 Variable2 May 25, 2047 I-19-A $ 4,049,969.15 Variable2 May 25, 2047 I-19-B $ 4,049,969.15 Variable2 May 25, 2047 I-20-A $ 3,835,204.58 Variable2 May 25, 2047 I-20-B $ 3,835,204.58 Variable2 May 25, 2047 I-21-A $ 4,830,929.47 Variable2 May 25, 2047 I-21-B $ 4,830,929.47 Variable2 May 25, 2047 I-22-B $ 59,187,491.39 Variable2 May 25, 2047 I-23-A $ 6,003,384.40 Variable2 May 25, 2047 I-23-B $ 6,003,384.40 Variable2 May 25, 2047 I-24-A $ 5,129,553.91 Variable2 May 25, 2047 I-24-B $ 5,129,553.91 Variable2 May 25, 2047 I-25-A $ 4,219,558.16 Variable2 May 25, 2047 I-25-B $ 4,219,558.16 Variable2 May 25, 2047 I-26-A $ 3,618,746.37 Variable2 May 25, 2047 I-26-B $ 3,618,746.37 Variable2 May 25, 2047 I-27-A $ 3,195,050.89 Variable2 May 25, 2047 I-27-B $ 3,195,050.89 Variable2 May 25, 2047 I-28-A $ 2,877,192.27 Variable2 May 25, 2047 I-28-B $ 2,877,192.27 Variable2 May 25, 2047 I-29-A $ 2,606,574.65 Variable2 May 25, 2047 I-29-B $ 2,606,574.65 Variable2 May 25, 2047 I-30-A $ 2,445,444.33 Variable2 May 25, 2047 I-30-B $ 2,445,444.33 Variable2 May 25, 2047 I-31-A $ 2,316,424.69 Variable2 May 25, 2047 I-31-B $ 2,316,424.69 Variable2 May 25, 2047 I-32-A $ 2,217,421.38 Variable2 May 25, 2047 I-32-B $ 2,217,421.38 Variable2 May 25, 2047 I-33-A $ 2,593,673.98 Variable2 May 25, 2047 I-33-B $ 2,593,673.98 Variable2 May 25, 2047 I-34-A $ 3,138,512.27 Variable2 May 25, 2047 I-34-B $ 3,138,512.27 Variable2 May 25, 2047 I-35-A $ 424,034.75 Variable2 May 25, 2047 I-35-B $ 424,034.75 Variable2 May 25, 2047 I-36-A $ 4,372,967.67 Variable2 May 25, 2047 I-36-B $ 4,372,967.67 Variable2 May 25, 2047 I-37-A $ 2,121,274.28 Variable2 May 25, 2047 I-37-B $ 2,121,274.28 Variable2 May 25, 2047 I-38-A $ 1,961,580.35 Variable2 May 25, 2047 I-38-B $ 1,961,580.35 Variable2 May 25, 2047 I-39-A $ 1,817,984.10 Variable2 May 25, 2047 I-39-B $ 1,817,984.10 Variable2 May 25, 2047 I-40-A $ 1,697,199.39 Variable2 May 25, 2047 I-40-B $ 1,697,199.39 Variable2 May 25, 2047 I-41-A $ 1,593,754.09 Variable2 May 25, 2047 I-41-B $ 1,593,754.09 Variable2 May 25, 2047 I-42-A $ 1,490,041.84 Variable2 May 25, 2047 I-42-B $ 1,490,041.84 Variable2 May 25, 2047 I-43-A $ 1,396,433.02 Variable2 May 25, 2047 I-43-B $ 1,396,433.02 Variable2 May 25, 2047 I-44-A $ 1,291,816.38 Variable2 May 25, 2047 I-44-B $ 1,291,816.38 Variable2 May 25, 2047 I-45-A $ 1,257,902.84 Variable2 May 25, 2047 I-45-B $ 1,257,902.84 Variable2 May 25, 2047 I-46-B $ 1,224,724.15 Variable2 May 25, 2047 I-47-A $ 1,183,164.01 Variable2 May 25, 2047 I-47-B $ 1,183,164.01 Variable2 May 25, 2047 I-48-A $ 1,154,768.08 Variable2 May 25, 2047 I-48-B $ 1,154,768.08 Variable2 May 25, 2047 I-49-A $ 1,121,669.11 Variable2 May 25, 2047 I-49-B $ 1,121,669.11 Variable2 May 25, 2047 I-50-A $ 1,099,979.62 Variable2 May 25, 2047 I-50-B $ 1,099,979.62 Variable2 May 25, 2047 I-51-A $ 1,072,576.92 Variable2 May 25, 2047 I-51-B $ 1,072,576.92 Variable2 May 25, 2047 I-52-A $ 1,045,428.43 Variable2 May 25, 2047 I-52-B $ 1,045,428.43 Variable2 May 25, 2047 I-53-A $ 1,018,205.92 Variable2 May 25, 2047 I-53-B $ 1,018,205.92 Variable2 May 25, 2047 I-54-A $ 991,121.37 Variable2 May 25, 2047 I-54-B $ 991,121.37 Variable2 May 25, 2047 I-55-A $ 964,810.47 Variable2 May 25, 2047 I-55-B $ 964,810.47 Variable2 May 25, 2047 I-56-A $ 928,957.07 Variable2 May 25, 2047 I-56-B $ 928,957.07 Variable2 May 25, 2047 I-57-A $ 891,368.93 Variable2 May 25, 2047 I-57-B $ 891,368.93 Variable2 May 25, 2047 I-58-A $ 852,206.84 Variable2 May 25, 2047 I-58-B $ 852,206.84 Variable2 May 25, 2047 I-59-A $ 27,587,521.32 Variable2 May 25, 2047 I-59-B $ 27,587,521.32 Variable2 May 25, 2047 IIX $210,811,616.18 Variable2 May 25, 2047 II-1-A $ 3,182,601.48 Variable2 May 25, 2047 II-1-B $ 3,182,601.48 Variable2 May 25, 2047 II-2-A $ 4,034,758.63 Variable2 May 25, 2047 II-2-B $ 4,034,758.63 Variable2 May 25, 2047 II-3-A $ 4,780,530.32 Variable2 May 25, 2047 II-3-B $ 4,780,530.32 Variable2 May 25, 2047 II-4-A $ 5,508,290.91 Variable2 May 25, 2047 II-4-B $ 5,508,290.91 Variable2 May 25, 2047 II-5-A $ 1,768,976.44 Variable2 May 25, 2047 II-5-B $ 1,768,976.44 Variable2 May 25, 2047 II-6-A $ 2,496,584.34 Variable2 May 25, 2047 II-6-B $ 2,496,584.34 Variable2 May 25, 2047 II-7-A $ 3,147,538.79 Variable2 May 25, 2047 II-7-B $ 3,147,538.79 Variable2 May 25, 2047 II-8-A $ 3,850,371.81 Variable2 May 25, 2047 II-8-B $ 3,850,371.81 Variable2 May 25, 2047 II-9-A $ 5,051,006.03 Variable2 May 25, 2047 II-9-B $ 5,051,006.03 Variable2 May 25, 2047 II-10-A $ 7,049,761.60 Variable2 May 25, 2047 II-10-B $ 7,049,761.60 Variable2 May 25, 2047 II-11-A $ 8,982,462.20 Variable2 May 25, 2047 II-11-B $ 8,982,462.20 Variable2 May 25, 2047 II-12-A $ 9,461,285.33 Variable2 May 25, 2047 II-12-B $ 9,461,285.33 Variable2 May 25, 2047 II-13-A $ 9,081,602.58 Variable2 May 25, 2047 II-13-B $ 9,081,602.58 Variable2 May 25, 2047 II-14-A $ 8,560,895.38 Variable2 May 25, 2047 II-14-B $ 8,560,895.38 Variable2 May 25, 2047 II-15-A $ 8,052,050.33 Variable2 May 25, 2047 II-15-B $ 8,052,050.33 Variable2 May 25, 2047 II-16-A $ 7,614,256.12 Variable2 May 25, 2047 II-16-B $ 7,614,256.12 Variable2 May 25, 2047 II-17-A $ 7,290,244.50 Variable2 May 25, 2047 II-17-B $ 7,290,244.50 Variable2 May 25, 2047 II-18-A $ 6,956,250.16 Variable2 May 25, 2047 II-18-B $ 6,956,250.16 Variable2 May 25, 2047 II-19-A $ 6,592,420.35 Variable2 May 25, 2047 II-19-B $ 6,592,420.35 Variable2 May 25, 2047 II-20-A $ 6,242,832.92 Variable2 May 25, 2047 II-20-B $ 6,242,832.92 Variable2 May 25, 2047 II-21-A $ 7,863,644.53 Variable2 May 25, 2047 II-21-B $ 7,863,644.53 Variable2 May 25, 2047 II-22-A $ 6,343,653.11 Variable2 May 25, 2047 II-22-B $ 96,343,653.11 Variable2 May 25, 2047 II-23-A $ 9,772,132.10 Variable2 May 25, 2047 II-23-B $ 9,772,132.10 Variable2 May 25, 2047 II-24-A $ 8,349,736.59 Variable2 May 25, 2047 II-24-B $ 8,349,736.59 Variable2 May 25, 2047 II-25-A $ 6,868,472.34 Variable2 May 25, 2047 II-25-B $ 6,868,472.34 Variable2 May 25, 2047 II-26-A $ 5,890,488.63 Variable2 May 25, 2047 II-26-B $ 5,890,488.63 Variable2 May 25, 2047 II-27-A $ 5,200,809.61 Variable2 May 25, 2047 II-27-B $ 5,200,809.61 Variable2 May 25, 2047 II-28-A $ 4,683,408.73 Variable2 May 25, 2047 II-28-B $ 4,683,408.73 Variable2 May 25, 2047 II-29-A $ 4,242,905.35 Variable2 May 25, 2047 II-29-B $ 4,242,905.35 Variable2 May 25, 2047 II-30-A $ 3,980,622.17 Variable2 May 25, 2047 II-30-B $ 3,980,622.17 Variable2 May 25, 2047 II-31-A $ 3,770,607.81 Variable2 May 25, 2047 II-31-B $ 3,770,607.81 Variable2 May 25, 2047 II-32-A $ 3,609,453.12 Variable2 May 25, 2047 II-32-B $ 3,609,453.12 Variable2 May 25, 2047 II-33-A $ 4,221,906.02 Variable2 May 25, 2047 II-33-B $ 4,221,906.02 Variable2 May 25, 2047 II-34-A $ 5,108,777.73 Variable2 May 25, 2047 II-34-B $ 5,108,777.73 Variable2 May 25, 2047 II-35-A $ 690,231.25 Variable2 May 25, 2047 II-35-B $ 690,231.25 Variable2 May 25, 2047 II-36-A $ 7,118,187.83 Variable2 May 25, 2047 II-36-B $ 7,118,187.83 Variable2 May 25, 2047 II-37-A $ 3,452,947.72 Variable2 May 25, 2047 II-37-B $ 3,452,947.72 Variable2 May 25, 2047 II-38-A $ 3,193,002.65 Variable2 May 25, 2047 II-38-B $ 3,193,002.65 Variable2 May 25, 2047 II-39-A $ 2,959,260.90 Variable2 May 25, 2047 II-39-B $ 2,959,260.90 Variable2 May 25, 2047 II-40-A $ 2,762,651.11 Variable2 May 25, 2047 II-40-B $ 2,762,651.11 Variable2 May 25, 2047 II-41-A $ 2,594,265.91 Variable2 May 25, 2047 II-41-B $ 2,594,265.91 Variable2 May 25, 2047 II-42-A $ 2,425,446.16 Variable2 May 25, 2047 II-42-B $ 2,425,446.16 Variable2 May 25, 2047 II-43-A $ 2,273,072.48 Variable2 May 25, 2047 II-43-B $ 2,273,072.48 Variable2 May 25, 2047 II-44-A $ 2,102,780.62 Variable2 May 25, 2047 II-44-B $ 2,102,780.62 Variable2 May 25, 2047 II-45-A $ 2,047,577.16 Variable2 May 25, 2047 II-45-B $ 2,047,577.16 Variable2 May 25, 2047 II-46-A $ 1,993,569.85 Variable2 May 25, 2047 II-46-B $ 1,993,569.85 Variable2 May 25, 2047 II-47-A $ 1,925,919.49 Variable2 May 25, 2047 II-47-B $ 1,925,919.49 Variable2 May 25, 2047 II-48-A $ 1,879,697.42 Variable2 May 25, 2047 II-48-B $ 1,879,697.42 Variable2 May 25, 2047 II-49-A $ 1,825,819.89 Variable2 May 25, 2047 II-49-B $ 1,825,819.89 Variable2 May 25, 2047 II-50-A $ 1,790,514.38 Variable2 May 25, 2047 II-50-B $ 1,790,514.38 Variable2 May 25, 2047 II-51-A $ 1,745,909.08 Variable2 May 25, 2047 II-51-B $ 1,745,909.08 Variable2 May 25, 2047 II-52-A $ 1,701,717.57 Variable2 May 25, 2047 II-52-B $ 1,701,717.57 Variable2 May 25, 2047 II-53-A $ 1,657,405.58 Variable2 May 25, 2047 II-53-B $ 1,657,405.58 Variable2 May 25, 2047 II-54-A $ 1,613,318.13 Variable2 May 25, 2047 II-54-B $ 1,613,318.13 Variable2 May 25, 2047 II-55-A $ 1,570,490.03 Variable2 May 25, 2047 II-55-B $ 1,570,490.03 Variable2 May 25, 2047 II-56-A $ 1,512,128.93 Variable2 May 25, 2047 II-56-B $ 1,512,128.93 Variable2 May 25, 2047 II-57-A $ 1,450,944.07 Variable2 May 25, 2047 II-57-B $ 1,450,944.07 Variable2 May 25, 2047 II-58-A $ 1,387,197.16 Variable2 May 25, 2047 II-58-B $ 1,387,197.16 Variable2 May 25, 2047 II-59-A $ 44,906,153.68 Variable2 May 25, 2047 II-59-B $ 44,906,153.68 Variable2 May 25, 2047 P $ 100.00 Variable2 May 25, 2047 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass-Through Rate” herein. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests and certain other related assets subject to this Agreement (exclusive of the Reserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as “REMIC 2.” The Class R-2 Interest shall represent the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 2 Pass-Through Rate, the initial Uncertificated Principal Balance, and solely for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 2 Regular Interests. None of the REMIC 2 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC I 2 Pass-Through Rate Assumed Final Maturity Date1 AA $780,895,878.44 Variable2 May 25, 2047 A-IA $ 2,457,750.00 Variable2 May 25, 2047 A-IIA1 $ 1,787,125.00 Variable2 May 25, 2047 A-IIA2 $ 626,610.00 Variable2 May 25, 2047 A-IIA3 $ 997,070.00 Variable2 May 25, 2047 A-IIA4 $ 589,775.00 Variable2 May 25, 2047 M1 $ 254,985.00 Variable2 May 25, 2047 M2 $ 223,115.00 Variable2 May 25, 2047 M3 $ 135,460.00 Variable2 May 25, 2047 M4 $ 119,525.00 Variable2 May 25, 2047 M5 $ 115,540.00 Variable2 May 25, 2047 M6 $ 107,570.00 Variable2 May 25, 2047 M7 $ 103,590.00 Variable2 May 25, 2047 M8 $ 63,745.00 Variable2 May 25, 2047 M9 $ 87,655.00 Variable2 May 25, 2047 ZZ $ 8,267,135.58 Variable2 May 25, 2047 1GRP $ 11,492.04 Variable2 May 25, 2047 1SUB $ 60,647.04 Variable2 May 25, 2047 2GRP $ 18,707.87 Variable2 May 25, 2047 2SUB $ 98,719.47 Variable2 May 25, 2047 Swap IO N/A3 Variable2 May 25, 2047 FMR IO N/A4 Variable2 May 25, 2047 XX $796,642,962.59 Variable2 May 25, 2047 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each REMIC 2 Regular InterestsInterest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 2 Pass-Through Rate” herein. 3 REMIC 2 Regular Interest Swap IO will not have a principal amount but will accrue interest on its Uncertificated Notional Amount, as defined herein.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-2 Mortgage Loan Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 2 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of fifteen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A-1A Certificates, (iii) the Class 2-A-1B Certificates, (iv) the Class 2-A-1C Certificates, (v) the Class 2-A-2 Certificates, (vi) the Class X Certificates, (vii) the Class PO Certificates, (viii) the Class A-R Certificates, (ix) the Class B-1 Certificates, (x) the Class B-2 Certificates, (xi) the Class B-3 Certificates, (xii) the Class B-4 Certificates, (xiii) the Class B-5 Certificates, (xiv) the Class B-6 Certificates and (xv) the Class Y Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund and the Yield Maintenance Account and the Yield Maintenance Agreements) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, (i) the Class 1-A, Class 2-A-1A, Class 2-A-1B, Class 2-A-1C, Class 2-A-2, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC ProvisionsBasis Risk Reserve Fund as provided in Section 5.07 and (ii) the Class 2-A-1A, Component I Class 2-A-1B, Class 2-A-1C, Class 2-A-2 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 4.04. The owners of the Class X Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreements, and the interests in the Lower-Tier REMIC formed hereby. The following table irrevocably sets forth Upper Tier REMIC shall hold as assets the designationuncertificated Lower-Tier REMIC Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as the "a REMIC regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interestsinterest.

PRELIMINARY STATEMENT. The Trustee on behalf of On June 23, 2005 the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, ClDepositor formed ▇▇▇▇▇▇▇▇▇ ▇▇▇-A-1Mortgage Securities Trust 2005-2, Class IIIas a Delaware statutory trust (the “Trust”) pursuant to the Trust Agreement, dated as of June 23, 2005 (the “Original Trust Agreement”), among the Depositor, the Trustee and the Delaware Trustee. The parties to this Agreement desire to amend and restate the Original Trust Agreement in its entirety, and, as evidenced by their signatures hereto, the Original Trust Agreement is hereby amended, restated and replaced in its entirety as of the date first written above by this Agreement. Through this Agreement, the Depositor intends to cause the issuance and sale of the Trust’s Mortgage Pass-A-2Through Certificates, Class IVSeries 2005-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 2 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from ▇▇▇▇▇▇▇▇▇. On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor Certificates evidencing the entire beneficial ownership of the Trust. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting created hereunder. The Certificates will consist of twelve classes of certificates, designated as (i) the Underlying Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class A-X Certificates, (vi) the Class A-R Certificate, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates and (other than xii) the Underlying Group V Class B-6 Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the Additional Collateral, the Yield Maintenance Agreements, the Auction Swap Agreement, the Yield Maintenance Account, and the Available Funds Cap Reserve Fund, collectively, the “Excluded Trust Assets”) is comprised of three REMICs in a tiered REMIC structure – the lower tier REMIC (the “Lower Tier REMIC”), the middle tier REMIC (the “Middle Tier REMIC”), and the upper tier REMIC (the “Upper Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Class A-1, Class A-2, Class A-3, and Class A-4 Certificates represent the right to receive payments in respect of Available Funds Cap Shortfalls from the Available Funds Cap Reserve Fund as provided in Section 5.08 and the Yield Maintenance Account as provided in Section 5.09. The owners of the Class A-X Certificates beneficially own the Available Funds Cap Reserve Fund and the Yield Maintenance Account. The Class A-R Certificate represents the sole class of residual interest in each REMIC. The Lower Tier REMIC I"will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Assets) and will issue interests (the “Lower Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower Tier REMIC. The Middle Tier REMIC will hold as its assets the Lower Tier Regular Interests and will issue interests (the “Middle Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Middle Tier REMIC) and a residual interest (the “Class MT-R Interest”) which will be uncertificated and which will represent the sole class of residual interest in the Middle Tier REMIC. The Trustee will hold the Middle Tier Regular Interests as assets of the Upper Tier REMIC. The Certificates, other than the Class A-R Certificate, will represent “regular interests” in the Upper Tier REMIC, and the Class A-R Certificate, which will represent the sole class of “residual interest” in the Upper Tier REMIC as well as ownership of the Class LT-R and Class MT-R Interests. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Principal Balance (as defined herein) class principal amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: Class LT-A-1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) (other than the Underlying 2) Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.1 A-1

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class X-1 Certificates, (vi) the Class X-2 Certificates, (vii) the Class M-1 Certificates (viii) the Class M-2 Certificates, (ix) the Class M-3 Certificates, (x) the Class M-4 Certificates, (xi) the Class M-5 Certificates, (xii) the Class M-6 Certificates, (xiii) the Class M-7 Certificates, (xiv) the Class M-8 Certificates, (xv) the Class M-9 Certificates, (xvi) the Class C Certificates, (xvii) the Class P Certificates, (xviii) the Class R Certificates and (xix) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, any Servicer Prepayment Charge Payment Amounts, the Interest Coverage Account, the Supplemental Interest Trust, the Cap Trust, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, the Interest Rate Swap Agreement and the Basis Risk Cap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the Uncertificated REMIC 1 Regular Interests shall be certificated. I Regular Interests.Variable(2) $ 36,129,153.56 September 25, 2037 I-1-B Variable(2) $ 2,980,509.38 September 25, 2037 I-2-B Variable(2) $ 2,919,426.57 September 25, 2037 I-3-B Variable(2) $ 2,874,056.90 September 25, 2037 I-4-B Variable(2) $ 2,800,689.88 September 25, 2037 I-5-B Variable(2) $ 2,743,297.53 September 25, 2037 I-6-B Variable(2) $ 2,724,509.42 September 25, 2037 I-7-B Variable(2) $ 2,729,589.27 September 25, 2037 I-8-B Variable(2) $ 2,657,331.94 September 25, 2037 I-9-B Variable(2) $ 2,853,113.75 September 25, 2037 I-10-B Variable(2) $ 3,003,565.49 September 25, 2037 I-11-B Variable(2) $ 6,395,638.60 September 25, 2037 I-12-B Variable(2) $ 30,812,323.62 September 25, 2037 I-13-B Variable(2) $ 39,481,406.02 September 25, 2037 I-14-B Variable(2) $ 1,604,016.32 September 25, 2037 I-15-B Variable(2) $ 1,482,574.27 September 25, 2037 I-16-B Variable(2) $ 1,246,009.26 September 25, 2037 I-17-B Variable(2) $ 793,343.04 September 25, 2037 I-18-B Variable(2) $ 774,583.80 September 25, 2037 I-19-B Variable(2) $ 756,304.75 September 25, 2037 I-20-B Variable(2) $ 738,488.56 September 25, 2037 I-21-B Variable(2) $ 721,126.14 September 25, 2037 I-23-B Variable(2) $ 824,412.89 September 25, 2037 I-24-B Variable(2) $ 1,212,164.76 September 25, 2037 I-25-B Variable(2) $ 4,676,334.31 September 25, 2037 I-26-A Variable(2) $ 494,308.31 September 25, 2037 I-26-B Variable(2) $ 494,308.31 September 25, 2037 I-27-A Variable(2) $ 483,959.66 September 25, 2037 I-27-B Variable(2) $ 483,959.66 September 25, 2037 I-28-B Variable(2) $ 473,842.86 September 25, 2037 I-29-A Variable(2) $ 463,954.60 September 25, 2037 I-29-B Variable(2) $ 463,954.60 September 25, 2037 I-30-B Variable(2) $ 454,285.80 September 25, 2037 I-32-B Variable(2) $ 435,594.23 September 25, 2037 I-33-A Variable(2) $ 426,559.89 September 25, 2037 I-33-B Variable(2) $ 426,559.89 September 25, 2037 I-34-A Variable(2) $ 417,726.05 September 25, 2037 I-34-B Variable(2) $ 417,726.05 September 25, 2037 I-35-B Variable(2) $ 409,088.57 September 25, 2037 I-36-B Variable(2) $ 400,641.67 September 25, 2037 I-38-B Variable(2) $ 384,303.97 September 25, 2037 I-39-A Variable(2) $ 376,404.91 September 25, 2037 I-39-B Variable(2) $ 376,404.91 September 25, 2037 I-40-A Variable(2) $ 368,679.12 September 25, 2037 I-40-B Variable(2) $ 368,679.12 September 25, 2037 I-41-A Variable(2) $ 361,122.45 September 25, 2037 I-41-B Variable(2) $ 361,122.45 September 25, 2037 I-42-A Variable(2) $ 353,730.80 September 25, 2037 I-42-B Variable(2) $ 353,730.80 September 25, 2037 I-43-A Variable(2) $ 346,502.51 September 25, 2037 I-43-B Variable(2) $ 346,502.51 September 25, 2037 I-44-A Variable(2) $ 339,430.16 September 25, 2037 I-44-B Variable(2) $ 339,430.16 September 25, 2037 I-45-A Variable(2) $ 340,855.85 September 25, 2037 I-45-B Variable(2) $ 340,855.85 September 25, 2037 I-47-A Variable(2) $ 424,391.65 September 25, 2037 I-47-B Variable(2) $ 424,391.65 September 25, 2037 I-48-B Variable(2) $ 1,147,089.52 September 25, 2037 I-49-A Variable(2) $ 1,239,006.21 September 25, 2037 I-49-B Variable(2) $ 1,239,006.21 September 25, 2037 I-50-A Variable(2) $ 241,111.88 September 25, 2037 I-50-B Variable(2) $ 241,111.88 September 25, 2037 I-51-A Variable(2) $ 13,255,744.98 September 25, 2037 I-51-B Variable(2) $ 13,255,744.98 September 25, 2037 II Variable(2) $ 18,608,514.63 September 25, 2037 II-1-A Variable(2) $ 1,535,123.12 September 25, 2037 II-1-B Variable(2) $ 1,535,123.12 September 25, 2037 II-2-B Variable(2) $ 1,503,662.18 September 25, 2037 II-3-A Variable(2) $ 1,480,294.35 September 25, 2037 II-3-B Variable(2) $ 1,480,294.35 September 25, 2037 II-4-A Variable(2) $ 1,442,506.37 September 25, 2037 II-4-B Variable(2) $ 1,442,506.37 September 25, 2037 II-5-A Variable(2) $ 1,412,946.22 September 25, 2037 II-5-B Variable(2) $ 1,412,946.22 September 25, 2037 II-6-A Variable(2) $ 1,403,269.33 September 25, 2037 II-6-B Variable(2) $ 1,403,269.33 September 25, 2037 II-7-A Variable(2) $ 1,405,885.73 September 25, 2037 II-7-B Variable(2) $ 1,405,885.73 September 25, 2037 II-8-A Variable(2) $ 1,368,669.31 September 25, 2037 II-8-B Variable(2) $ 1,368,669.31 September 25, 2037 II-9-A Variable(2) $ 1,469,507.50 September 25, 2037 II-9-B Variable(2) $ 1,469,507.50 September 25, 2037 II-10-B Variable(2) $ 1,546,998.26 September 25, 2037 II-11-A Variable(2) $ 3,294,098.90 September 25, 2037 II-11-B Variable(2) $ 3,294,098.90 September 25, 2037 II-12-A Variable(2) $ 15,870,008.88 September 25, 2037 II-12-B Variable(2) $ 15,870,008.88 September 25, 2037 II-13-A Variable(2) $ 20,335,053.98 September 25, 2037 II-13-B Variable(2) $ 20,335,053.98 September 25, 2037 II-14-A Variable(2) $ 826,154.93 September 25, 2037 II-14-B Variable(2) $ 826,154.93 September 25, 2037 II-15-A Variable(2) $ 763,605.73 September 25, 2037 II-15-B Variable(2) $ 763,605.73 September 25, 2037 II-16-A Variable(2) $ 641,761.99 September 25, 2037 II-16-B Variable(2) $ 641,761.99 September 25, 2037 II-17-B Variable(2) $ 408,614.46 September 25, 2037 II-18-A Variable(2) $ 398,952.45 September 25, 2037 II-18-B Variable(2) $ 398,952.45 September 25, 2037 II-19-A Variable(2) $ 389,537.75 September 25, 2037 II-19-B Variable(2) $ 389,537.75 September 25, 2037 II-20-A Variable(2) $ 380,361.44 September 25, 2037 II-20-B Variable(2) $ 380,361.44 September 25, 2037 II-21-A Variable(2) $ 371,418.86 September 25, 2037 II-21-B Variable(2) $ 371,418.86 September 25, 2037 II-22-B Variable(2) $ 362,702.78 September 25, 2037 II-23-B Variable(2) $ 424,617.11 September 25, 2037 II-24-A Variable(2) $ 624,330.24 September 25, 2037 II-24-B Variable(2) $ 624,330.24 September 25, 2037 II-25-A Variable(2) $ 2,408,564.44 September 25, 2037 II-25-B Variable(2) $ 2,408,564.44 September 25, 2037 II-26-A Variable(2) $ 254,595.44 September 25, 2037 II-26-B Variable(2) $ 254,595.44 September 25, 2037 II-27-A Variable(2) $ 249,265.34 September 25, 2037 II-27-B Variable(2) $ 249,265.34 September 25, 2037 II-28-A Variable(2) $ 244,054.64 September 25, 2037 II-28-B Variable(2) $ 244,054.64 September 25, 2037 II-29-A Variable(2) $ 238,961.65 September 25, 2037 II-29-B Variable(2) $ 238,961.65 September 25, 2037 II-30-A Variable(2) $ 233,981.70 September 25, 2037 II-30-B Variable(2) $ 233,981.70 September 25, 2037 II-31-B Variable(2) $ 229,114.35 September 25, 2037 II-32-A Variable(2) $ 224,354.52 September 25, 2037 II-32-B Variable(2) $ 224,354.52 September 25, 2037 II-33-A Variable(2) $ 219,701.36 September 25, 2037 II-33-B Variable(2) $ 219,701.36 September 25, 2037 II-34-A Variable(2) $ 215,151.45 September 25, 2037 II-34-B Variable(2) $ 215,151.45 September 25, 2037 II-35-A Variable(2) $ 210,702.68 September 25, 2037 II-35-B Variable(2) $ 210,702.68 September 25, 2037 II-36-B Variable(2) $ 206,352.08 September 25, 2037 II-37-B Variable(2) $ 202,097.93 September 25, 2037 I-38-A Variable(2) $ 197,937.28 September 25, 2037 II-38-B Variable(2) $ 197,937.28 September 25, 2037 II-39-A Variable(2) $ 193,868.84 September 25, 2037 II-39-B Variable(2) $ 193,868.84 September 25, 2037 II-40-A Variable(2) $ 189,889.63 September 25, 2037 II-40-B Variable(2) $ 189,889.63 September 25, 2037 II-41-A Variable(2) $ 185,997.55 September 25, 2037 II-41-B Variable(2) $ 185,997.55 September 25, 2037 II-42-A Variable(2) $ 182,190.45 September 25, 2037 II-42-B Variable(2) $ 182,190.45 September 25, 2037 II-43-A Variable(2) $ 178,467.49 September 25, 2037 II-43-B Variable(2) $ 178,467.49 September 25, 2037 II-44-A Variable(2) $ 174,824.84 September 25, 2037 II-44-B Variable(2) $ 174,824.84 September 25, 2037 II-45-A Variable(2) $ 175,559.15 September 25, 2037 II-45-B Variable(2) $ 175,559.15 September 25, 2037 II-47-A Variable(2) $ 218,584.60 September 25, 2037 II-47-B Variable(2) $ 218,584.60 September 25, 2037 II-48-A Variable(2) $ 590,812.98 September 25, 2037 II-48-B Variable(2) $ 590,812.98 September 25, 2037 II-49-A Variable(2) $ 638,155.04 September 25, 2037 II-49-B Variable(2) $ 638,155.04 September 25, 2037 II-50-A Variable(2) $ 124,185.62 September 25, 2037 II-50-B Variable(2) $ 124,185.62 September 25, 2037 II-51-A Variable(2) $ 6,827,423.77 September 25, 2037 II-51-B Variable(2) $ 6,827,423.77 September 25, 2037 P Variable(2) $ 100.00 September 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-AR1 Mortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of nineteen classes of certificates, designated as (i) the Underlying Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificate, (v) the Class 2A-1C Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class R Certificates, (xvii) the Class R-II Certificates, (xviii) the Class C Certificates and (other than xix) the Underlying Group V Class P Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund (the “Excluded Trust Property”)) comprises two REMICs in a tiered REMIC structure – the “Lower-Tier REMIC” and the “Upper Tier REMIC”. Each Certificate, other than the Class R and Class R-II Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Offered Certificates and the Class M-10 Certficates represent the right to receive payments in respect of Basis Risk Shortfalls as provided in Section 5.08. The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC I"and the Class R-II Certificate represents the sole class of residual interest in the Lower-Tier REMIC. The Lower-Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue interests (the “Lower-Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower-Tier REMIC) and the Class R-II Certificate (which represents the sole class of residual interests in the Lower-Tier REMIC. The Trustee will hold the Lower-Tier Regular Interests as assets of the Upper-Tier REMIC. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for the Lower-Tier REMIC and the Upper-Tier REMIC is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, interest rate, and initial principal balance of each Lower-Tier Interest in the Uncertificated PassLower-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for Tier REMIC, each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V CertificatesR-II Certificate) has been is hereby designated as a regular interest in the "latest possible maturity date" for each of Lower-Tier REMIC (the Uncertificated “Lower-Tier REMIC I Regular Interests.). LT-1A1A (1) (2) 1A-1A LT-1A1B (1) (2) 1A-1B LT-2A1A (1) (2) 2A-1A LT-2A1B (1) (2) ▇▇-▇▇ ▇▇-▇▇▇▇ (1) (2) 2A-1C LT-M1 (1) (2) M1 LT-M2 (1) (2) M2 LT-M3 (1) (2) M3 LT-M4 (1) (2) M4 LT-M5 (1) (2) M5 LT-M6 (1) (2) M6 LT-M7 (1) (2) M7 LT-M8 (1) (2) M8 LT-M9 (1) (2) M9 LT-M10 (1) (2) ▇▇▇ ▇▇-▇ (1) (3) N/A R-II Certificate (4) (4) N/A

PRELIMINARY STATEMENT. The Trustee on behalf of Company intends to sell mortgage pass-through certificates (collectively, the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust"Certificates"), Series 2007-R8to be issued hereunder in five classes (each, Class I-A-1a "Class"), Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund (as defined herein), consisting primarily of the primary assets of which are Mortgage Loans, the Underlying Certificates Pre-Funding Accounts and the Interest Coverage Accounts (each, as defined herein). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V CertificatesPre-Funding Accounts and the Interest Coverage Accounts) as a REMIC real estate mortgage investment conduit (a "REMIC") for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate Class A Certificates (as defined herein) and Class S Certificates (as defined herein) will represent ownership of "regular interests" in the initial Uncertificated REMIC, and the Class R Certificates will constitute the sole Class of "residual interest" in the REMIC for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table sets forth the designation, type, aggregate Original Certificate Principal Balance (as defined herein) ), maturity date, initial ratings and certain features for each Class of Certificates comprising the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as interests in the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.Trust Fund created hereunder. AGGREGATE DESIGNATION ORIGINAL ----------------------- CERTIFICATE [DC]R [MOOD▇'▇] TYPE PRINCIPAL BALANCE FEATURES MATURITY DATE [S&P] -------- ------------- --------------- ----------------------- --------------- --------------------- --------

PRELIMINARY STATEMENT. The Trustee on behalf Depositor is the owner of the Trust that is hereby conveyed to the Trustee in return for the Certificates. The Trust [(exclusive of the Pre-Funding Account)] for federal income tax purposes will execute consist of two REMICs (the "Subsidiary REMIC" and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R "Master REMIC"). The Certificates representing in the aggregate will represent the entire beneficial ownership interest in the Trust. The assets of the Trust [(as defined hereinexclusive of the Pre-Funding Account), ] will constitute the primary assets of which are the Underlying Certificates (Subsidiary REMIC and the Subsidiary REMIC will issue eleven uncertificated regular interests that will be held as defined herein)the sole assets of the Master REMIC. The Depositor intends to sell some or all Class R-1 and Class R-2 Interests will be the residual interests in each of the CertificatesSubsidiary REMIC and the Master REMIC, respectively. REMIC I As provided hereinThe Class A, Class M, Class B and Class X Certificates will represent the Trustee will elect to treat the segregated pool of assets contained "regular interests" in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a Master REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of and the Class R Certificates will represent ownership of the sole class of single "residual interestsinterest" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated Subsidiary REMIC I Regular and the Master REMIC. All interests created hereby will be retired on or before the Latest Possible Maturity Date, which shall be the Distribution Date in [___________]. The Subsidiary REMIC will be evidenced by the Class 1-Accrual Interest (the "REMIC 1 Accrual Class"), and the Class 1-A-1, Class 1-A-2, Class 1-A-3, Class 1-A-4, Class 1-A-5, Class 1-A-6, Class 1-A-7, Class 1-M-1, Class 1-M-2, Class 1-B-1 Interests (as defined hereinthe "REMIC 1 Accretion Directed Classes"), which will be uncertificated and non-transferable and are hereby designated as the "regular interests" in the Subsidiary REMIC. The REMIC I. Solely 1 Accrual Class and each REMIC 1 Accretion Directed Class are each hereby designated regular interests in the Subsidiary REMIC for federal income tax purposes and will have the following designations, initial principal balances, pass-through rates, and Corresponding Classes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Master REMIC Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.Corresponding Classes"):

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-10 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 10 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class 1-A-1 Certificates, (ii) the Class 1-A-2A Certificates, (iii) the Class 1-A-2B Certificates, (iv) the Class 2-A Certificates, (v) the Class 3-A-1A Certificates, (vi) the Class 3-A-1B Certificates, (vii) the Class 4-A Certificates, (viii) the Class X-1 Certificates, (ix) the Class X-2 Certificates, (x) the Class X-3 Certificates, (xi) the Class A-R Certificates, (xii) the Class B-1 Certificates, (xiii) the Class B-2 Certificates, (xiv) the Class B-3 Certificates, (xv) the Class B-4 Certificates, (xvi) the Class B-5 Certificates, (xvii) the Class B-6 Certificates, (xviii) the Class P Certificate and (xix) the Class Y Certificate. REMIC I As provided herein, the Trustee will shall elect to treat that the segregated pool Trust Fund be treated for federal income tax purposes as comprising three real estate mortgage investment conduits (each, a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC”). Each Certificate, other than the Class P, Class Y and Class A-R Certificates, shall represent ownership of assets contained a regular interest in the Upper-Tier REMIC, as described herein. Each of the Class P and Class Y Certificates represents an interest in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a but does not represent an interest in any REMIC for federal income tax purposes, designated as "REMIC I"created hereunder. For purposes of the REMIC Provisions, Component I of the The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in REMIC I. Component I each REMIC. The Class Y Certificates, which will not have a Class Principal Balance and will not accrue interest, will only be entitled to received on any Distribution Date the excess, if any, of amounts paid with respect to the Yield Maintenance Agreement in excess of the Yield Maintenance Distributable Amount for the Yield Maintenance Agreement. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund and the interests in any REMIC formed hereby. The Middle-Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Upper-Tier REMIC shall hold as assets the uncertificated Middle-Tier REMIC Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Class Principal Balance (as defined herein) Amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: Class LT-Group 1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 158,612,755.32 Group1 Class LT-SC1 (other than the Underlying 1) $ 123,815.71 Group V Certificates1 Class LT-Group 2 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 115,245,188.61 Group 2 Class LT-SC2 (2) $ 89,961.50 Group 2 Class LT-Group 3 (3) $ 279,719,560.29 Group 3 Class LT-SC3 (3) $ 218,359.19 Group 3 Class LT-Group 4 (4) $ 174,016,743.64 Group 4 Class LT-SC4 (4) $ 135,844.89 Group 4 Class LT-R (5) (5) N/A __________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple Classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty Classes of Certificates, designated as (i) the Class AV, Class AF-1, Class AF-2, Class AF-3 and Class AF-4 Certificates, (ii) the Class M-1, Class M-2, Class M-3, Class M-4, Class M-5, Class M-6 and Class M-7 Certificates, (iii) the Class B-1, Class B-2, Class B-3 and Class B-4 Certificates, (iv) the Class P Certificates, (v) the Class CE Certificates, (vi) the Class R Certificates and (vii) the Class R-X Certificates. The Depositor hereby assigns to the Trustee, acting on behalf of the CertificatesCertificateholders its interests and rights in the Mortgage Loans. REMIC I As provided herein, for federal income tax purposes, the Trustee will elect to treat the segregated pool pools of assets contained subject to this Agreement (exclusive of the Senior Cap Account, the Mezzanine Cap Account, the Basis Risk Reserve Fund and the Final Maturity Reserve Fund) as nine real estate mortgage investment conduits (each, a "REMIC"): the Subsidiary REMIC, the Intermediate REMIC, the Master REMIC, the Class CE REMIC, the Class P REMIC and the four Class B REMICs. The Subsid▇▇▇▇ ▇▇▇IC will consist of (a) all of the assets constituting the Group 1 Mortgage Loans and all of the assets constituting the Group 2 Mortgage Loans. The Subsidiary REMIC will issue (1) the REMIC regular interests (the "Subsidiary REMIC Regular Interests") and (2) the SR Interest. The Subsidiary REMIC Regular Interests will be uncertificated and will represent the "regular interests" in the Trust Fund consisting Subsidiary REMIC and the SR Interest will represent the single class of "residual interest" in the Subsidiary REMIC. The Trustee will hold the Subsidiary REMIC Regular Interests for the benefit of the Underlying Intermediate REMIC. The assets of the Intermediate REMIC will consist of the Subsidiary REMIC Regular Interests and the interests in the Intermediate REMIC will be evidenced by (i) the Intermediate REMIC Regular Interests, which will be uncertificated and will represent the "regular interests" in the Intermediate REMIC and (ii) the IR Interest, which will represent the single class of "residual interest" in the Intermediate REMIC. The Trustee will hold the Intermediate REMIC Regular Interests for the benefit of the Master REMIC. The assets of the Master REMIC will consist of the Intermediate REMIC Regular Interests and the interests in the Master REMIC will be evidenced by (i) the Regular Certificates (other than the Underlying Group V Class CE, Class P and Class B Certificates), the Class CEM Interest, the Class PM Interest and the four Class BM Interests, which will represent the "regular interests" in the Master REMIC and (ii) as the Class MR Interest, which will represent the single class of "residual interest" in the Master REMIC. The Trustee will hold the Class CEM Interest in the Master REMIC for the benefit of the Class CE REMIC. The assets of the Class CE REMIC will consist of the Clas▇ ▇▇▇ ▇▇terest in the Master REMIC ▇▇▇ ▇▇▇erests in the Class CE REMIC will be evidenced by (i) the Class CE Certificate, which w▇▇▇ ▇▇▇▇esent the "regular interests" in the Class CE REMIC and (ii) the Class CER-X Interest, which will represent th▇ ▇▇▇▇▇▇ class of "residual interest" in the Class CE REMIC. The Trustee will hold the Class PM Interest in ▇▇▇ ▇▇▇ter REMIC for the benefit of the Class P REMIC. The assets of the Class P REMIC will consist of the Class PM Interest in the Master REMIC and interests in the Class P REMIC will be evidenced by (i) the Class P Certificate, which will represent the "regular interests" in the Class P REMIC and (ii) the Class PR-X Interest, which will represent the single class of "residual interest" in the Class P REMIC. The Trustee will hold each Class BM Interest in the Master REMIC for the benefit of a separate Class B REMIC. The assets of each Class B REMIC will consist of a single Class BM Interest in the Master REMIC and interests in each Class B REMIC will be evidenced by (i) a separately numbered Class B Certificate, which will represent the "regular interest" in that Class B REMIC and (ii) a separately numbered, uncertificated Class BR Interest, which will represent the single class of "residual interest" in that Class B REMIC. The Class R Certificates will represent the Class SR, Class IR and Class MR Interests, and the Class R-X Certificates will represent the residual interest in each of the Class CE REMIC, Class P REMIC and four Class B REMICs. The "latest possib▇▇ ▇▇▇▇▇ity date" for federal income tax purposes of all REMICs, and regular and residual interests created hereunder will be the Latest Possible Maturity Date. The Subsidiary REMIC -------------------- The Subsidiary REMIC Interests, each of which (except for the Class SR Interests) is hereby designated a REMIC regular interest for federal income tax purposes, designated will have the principal balances, pass-through rates and Corresponding Loan Groups as "REMIC I". For purposes of set forth in the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.table:

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-1 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of thirteen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A Certificates, (iii) the Class 3-A Certificates, (iv) the Class 4-A Certificates, (v) the Class X Certificates, (vi) the Class A-R Certificates, (vii) the Class B-1 Certificate, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates, (xii) the Class B-6 Certificates and (xiii) the Class P Certificate. REMIC I As provided herein, the Trustee will shall elect that the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund) be treated for federal income tax purposes as comprising three real estate mortgage investment conduits (each, a “REMIC” or, in the alternative, the “Lower-Tier REMIC”, the “Middle-Tier REMIC”, and the “Upper-Tier REMIC”). Each Certificate, other than the Class P Certificate and the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as described herein. In addition, the Class 1-A Certificates represent the right to treat receive payments in respect of Basis Risk Shortfalls from the segregated pool Basis Risk Reserve Fund as provided in Section 5.07. The owners of assets contained the Class X Certificates beneficially own the Basis Risk Reserve Fund. The Class P Certificate represents an interest in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a but does not represent an interest in any REMIC for federal income tax purposes, designated as "REMIC I"created hereunder. For purposes of the REMIC Provisions, Component I of the The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, and the interests in any REMIC formed hereby. The Middle-Tier REMIC shall hold as assets the several classes of uncertificated interests of the Lower-Tier REMIC, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Upper Tier REMIC shall hold as assets the uncertificated Middle-Tier REMIC Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Class Principal Balance (as defined herein) Amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: Class LT-Group 1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 209,397,681.47 Group 1 Class LT-SC1 (other than the Underlying 1) $ 107,895.77 Group V Certificates1 Class LT-Group 2 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 166,706,331.39 Group 2 Class LT-SC2 (2) $ 85,902.34 Group 2 Class LT-Group 3 (3) $ 123,125,654.66 Group 3 Class LT-SC3 (3) $ 63,451.06 Group 3 Class LT-Group 4 (4) $ 102,725,423.35 Group 4 Class LT-SC4 (4) $ 52,933.57 Group 4 Class LT-R (5) (5) N/A __________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the RBSGC Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-A Mortgage Loan Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates A (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of eighteen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A-1 Certificates, (iii) the Class 2-A-2 Certificates, (iv) the Class 2-A-3 Certificates, (v) the Class 3-A Certificates, (vi) the Class 4-A Certificates, (vii) the Class 5-A Certificates, (viii) the Class X Certificates, (ix) the Class PO Certificates, (x) the Class A-R Certificates, (xi) the Class B-1 Certificates, (xii) the Class B-2 Certificates, (xiii) the Class B-3 Certificates, (xiv) the Class B-4 Certificates, (xv) the Class B-5 Certificates, (xvi) the Class B-6 Certificates, (xvii) the Class A-R-II Certificates and (xviii) the Class P Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V CertificatesClass P Distributable Amount) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class P, Class A-R, and Class A-R-II Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes The Class A-R-II Certificate represents ownership of the REMIC Provisionssole class of residual interest in the Lower-Tier REMIC, Component I of and the Class A-R Certificates will represent ownership of the sole class of "residual interests" interest in the Upper-Tier REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund, other than the Excluded Trust Property and the interests in the Lower-Tier REMIC formed hereby. The following table irrevocably sets forth Upper-Tier REMIC shall hold as assets the designationuncertificated Lower-Tier Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as the "a REMIC regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interestsinterest.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class B-1 Certificates, (xvi) the Class B-2 Certificates, (xvii) the Class B-3 Certificates, (xviii) the Class C Certificates, (xix) the Class P Certificates, (xx) the Class R Certificates and (xxi) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, any Servicer Prepayment Charge Payment Amounts, the Cap Contract, the Swap Account, the Supplemental Interest Trust and the Interest Rate Swap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 199,773,809.31 April 25, 2036 I-1-B Variable(2) $ 13,278,462.50 April 25, 2036 I-2-B Variable(2) $ 13,700,856.25 April 25, 2036 I-3-B Variable(2) $ 14,073,423.75 April 25, 2036 I-4-B Variable(2) $ 14,393,416.25 April 25, 2036 I-5-B Variable(2) $ 14,658,462.50 April 25, 2036 I-7-B Variable(2) $ 15,016,256.25 April 25, 2036 I-11-B Variable(2) $ 220,950,520.00 April 25, 2036 I-15-B Variable(2) $ 1,087,076.25 April 25, 2036 I-18-B Variable(2) $ 964,285.00 April 25, 2036 I-19-B Variable(2) $ 926,678.75 April 25, 2036 I-20-B Variable(2) $ 890,617.50 April 25, 2036 I-21-B Variable(2) $ 892,082.50 April 25, 2036 I-23-B Variable(2) $ 1,723,623.75 April 25, 2036 I-24-B Variable(2) $ 682,918.75 April 25, 2036 I-25-B Variable(2) $ 652,227.50 April 25, 2036 I-26-A Variable(2) $ 628,892.50 April 25, 2036 I-26-B Variable(2) $ 628,892.50 April 25, 2036 I-27-A Variable(2) $ 606,397.50 April 25, 2036 I-27-B Variable(2) $ 606,397.50 April 25, 2036 I-28-B Variable(2) $ 584,712.50 April 25, 2036 I-29-A Variable(2) $ 563,807.50 April 25, 2036 I-29-B Variable(2) $ 563,807.50 April 25, 2036 I-30-A Variable(2) $ 543,656.25 April 25, 2036 I-30-B Variable(2) $ 543,656.25 April 25, 2036 I-31-B Variable(2) $ 524,227.50 April 25, 2036 I-32-B Variable(2) $ 505,498.75 April 25, 2036 I-33-B Variable(2) $ 487,441.25 April 25, 2036 I-34-A Variable(2) $ 470,032.50 April 25, 2036 I-34-B Variable(2) $ 470,032.50 April 25, 2036 I-35-A Variable(2) $ 453,248.75 April 25, 2036 I-35-B Variable(2) $ 453,248.75 April 25, 2036 I-36-A Variable(2) $ 437,066.25 April 25, 2036 I-36-B Variable(2) $ 437,066.25 April 25, 2036 I-37-B Variable(2) $ 421,466.25 April 25, 2036 I-38-A Variable(2) $ 406,422.50 April 25, 2036 I-38-B Variable(2) $ 406,422.50 April 25, 2036 I-39-B Variable(2) $ 10,968,608.75 April 25, 2036 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-two classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) Class II-A-3 Certificates, (v) the Class X-1 Certificates, (vi) the Class X-2 Certificates, (vii) the Class X-3 Certificates, (viii) the Class M-1 Certificates, (ix) the Class M-1B Certificates, (x) the Class M-2 Certificates, (xi) the Class M-2B Certificates, (xii) the Class M-3 Certificates, (xiii) the Class M-4 Certificates, (xiv) the Class M-5 Certificates, (xv) the Class M-6 Certificates, (xvi) the Class M-7 Certificates, (xvii) the Class M-8 Certificates, (xviii) the Class M-9 Certificates, (xix) the Class C Certificates, (xx) the Class P Certificates, (xxi) the Class R Certificates and (xxii) the Class R-X Certificates. REMIC I 1 As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, any Servicer Prepayment Charge Payment Amounts, the Supplemental Interest Trust, the Cap Trust, the Interest Rate Cap Agreement, the Cap Account, the Cap Allocation Agreement, the Interest Rate Swap Agreement and the Basis Risk Cap Agreement) as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 74,494,429.04 October 25, 2037 I-1-A Variable(2) $ 6,625,870.23 October 25, 2037 I-1-B Variable(2) $ 6,625,870.23 October 25, 2037 I-2-B Variable(2) $ 6,610,964.84 October 25, 2037 I-3-A Variable(2) $ 6,477,336.49 October 25, 2037 I-3-B Variable(2) $ 6,477,336.49 October 25, 2037 I-4-B Variable(2) $ 6,346,419.11 October 25, 2037 I-5-A Variable(2) $ 6,218,153.91 October 25, 2037 I-5-B Variable(2) $ 6,218,153.91 October 25, 2037 I-6-B Variable(2) $ 6,092,489.33 October 25, 2037 I-7-A Variable(2) $ 5,969,371.09 October 25, 2037 I-7-B Variable(2) $ 5,969,371.09 October 25, 2037 I-8-A Variable(2) $ 5,848,748.54 October 25, 2037 I-8-B Variable(2) $ 5,848,748.54 October 25, 2037 I-9-B Variable(2) $ 5,994,109.98 October 25, 2037 I-10-B Variable(2) $ 5,800,738.87 October 25, 2037 I-11-A Variable(2) $ 6,444,617.55 October 25, 2037 I-11-B Variable(2) $ 6,444,617.55 October 25, 2037 I-12-A Variable(2) $ 21,558,191.62 October 25, 2037 I-12-B Variable(2) $ 21,558,191.62 October 25, 2037 I-13-A Variable(2) $ 24,506,535.45 October 25, 2037 I-13-B Variable(2) $ 24,506,535.45 October 25, 2037 I-14-A Variable(2) $ 12,415,862.89 October 25, 2037 I-14-B Variable(2) $ 12,415,862.89 October 25, 2037 I-15-A Variable(2) $ 11,513,586.80 October 25, 2037 I-15-B Variable(2) $ 11,513,586.80 October 25, 2037 I-16-A Variable(2) $ 10,598,500.29 October 25, 2037 I-16-B Variable(2) $ 10,598,500.29 October 25, 2037 I-17-B Variable(2) $ 7,065,352.98 October 25, 2037 I-18-A Variable(2) $ 4,532,472.14 October 25, 2037 I-18-B Variable(2) $ 4,532,472.14 October 25, 2037 I-19-A Variable(2) $ 4,409,715.73 October 25, 2037 I-19-B Variable(2) $ 4,409,715.73 October 25, 2037 I-20-A Variable(2) $ 4,290,444.60 October 25, 2037 I-20-B Variable(2) $ 4,290,444.60 October 25, 2037 I-21-A Variable(2) $ 4,174,557.44 October 25, 2037 I-21-B Variable(2) $ 4,174,557.44 October 25, 2037 I-22-B Variable(2) $ 4,220,634.96 October 25, 2037 I-23-A Variable(2) $ 4,096,100.18 October 25, 2037 I-23-B Variable(2) $ 4,096,100.18 October 25, 2037 I-24-A Variable(2) $ 4,289,749.89 October 25, 2037 I-24-B Variable(2) $ 4,289,749.89 October 25, 2037 I-25-A Variable(2) $ 43,006,315.13 October 25, 2037 I-25-B Variable(2) $ 43,006,315.13 October 25, 2037 I-26-A Variable(2) $ 14,684,094.88 October 25, 2037 I-26-B Variable(2) $ 14,684,094.88 October 25, 2037 I-27-A Variable(2) $ 1,956,655.32 October 25, 2037 I-27-B Variable(2) $ 1,956,655.32 October 25, 2037 I-28-A Variable(2) $ 1,911,106.97 October 25, 2037 I-28-B Variable(2) $ 1,911,106.97 October 25, 2037 I-29-A Variable(2) $ 1,866,701.07 October 25, 2037 I-29-B Variable(2) $ 1,866,701.07 October 25, 2037 I-30-A Variable(2) $ 1,823,409.60 October 25, 2037 I-30-B Variable(2) $ 1,823,409.60 October 25, 2037 I-32-B Variable(2) $ 1,740,045.09 October 25, 2037 I-33-A Variable(2) $ 1,699,915.97 October 25, 2037 I-33-B Variable(2) $ 1,699,915.97 October 25, 2037 I-34-A Variable(2) $ 1,660,785.49 October 25, 2037 I-34-B Variable(2) $ 1,660,785.49 October 25, 2037 I-35-A Variable(2) $ 1,622,625.60 October 25, 2037 I-35-B Variable(2) $ 1,622,625.60 October 25, 2037 I-36-A Variable(2) $ 1,585,413.69 October 25, 2037 I-36-B Variable(2) $ 1,585,413.69 October 25, 2037 I-37-A Variable(2) $ 1,549,121.73 October 25, 2037 I-37-B Variable(2) $ 1,549,121.73 October 25, 2037 I-38-A Variable(2) $ 1,513,725.28 October 25, 2037 I-38-B Variable(2) $ 1,513,725.28 October 25, 2037 I-39-A Variable(2) $ 1,479,203.55 October 25, 2037 I-39-B Variable(2) $ 1,479,203.55 October 25, 2037 I-40-A Variable(2) $ 1,445,529.39 October 25, 2037 I-40-B Variable(2) $ 1,445,529.39 October 25, 2037 I-41-A Variable(2) $ 1,412,683.80 October 25, 2037 I-41-B Variable(2) $ 1,412,683.80 October 25, 2037 I-42-A Variable(2) $ 1,380,642.38 October 25, 2037 I-42-B Variable(2) $ 1,380,642.38 October 25, 2037 I-43-A Variable(2) $ 1,349,386.12 October 25, 2037 I-43-B Variable(2) $ 1,349,386.12 October 25, 2037 I-44-A Variable(2) $ 1,318,892.40 October 25, 2037 I-44-B Variable(2) $ 1,318,892.40 October 25, 2037 I-45-A Variable(2) $ 1,289,143.14 October 25, 2037 I-45-B Variable(2) $ 1,289,143.14 October 25, 2037 I-47-A Variable(2) $ 1,241,356.89 October 25, 2037 I-47-B Variable(2) $ 1,241,356.89 October 25, 2037 I-48-A Variable(2) $ 1,682,031.86 October 25, 2037 I-48-B Variable(2) $ 1,682,031.86 October 25, 2037 I-49-A Variable(2) $ 3,327,599.89 October 25, 2037 I-49-B Variable(2) $ 3,327,599.89 October 25, 2037 I-50-A Variable(2) $ 11,175,968.68 October 25, 2037 I-50-B Variable(2) $ 11,175,968.68 October 25, 2037 I-51-A Variable(2) $ 40,968,042.91 October 25, 2037 I-51-B Variable(2) $ 40,968,042.91 October 25, 2037 II Variable(2) $ 28,448,195.06 October 25, 2037 II-1-A Variable(2) $ 2,530,307.27 October 25, 2037 II-1-B Variable(2) $ 2,530,307.27 October 25, 2037 II-2-A Variable(2) $ 2,524,615.16 October 25, 2037 II-2-B Variable(2) $ 2,524,615.16 October 25, 2037 II-3-A Variable(2) $ 2,473,584.76 October 25, 2037 II-3-B Variable(2) $ 2,473,584.76 October 25, 2037 II-4-A Variable(2) $ 2,423,589.64 October 25, 2037 II-4-B Variable(2) $ 2,423,589.64 October 25, 2037 II-5-A Variable(2) $ 2,374,607.34 October 25, 2037 II-5-B Variable(2) $ 2,374,607.34 October 25, 2037 II-6-A Variable(2) $ 2,326,618.17 October 25, 2037 II-6-B Variable(2) $ 2,326,618.17 October 25, 2037 II-7-A Variable(2) $ 2,279,601.41 October 25, 2037 II-7-B Variable(2) $ 2,279,601.41 October 25, 2037 II-8-A Variable(2) $ 2,233,537.71 October 25, 2037 II-8-B Variable(2) $ 2,233,537.71 October 25, 2037 II-9-A Variable(2) $ 2,289,048.77 October 25, 2037 II-9-B Variable(2) $ 2,289,048.77 October 25, 2037 I-10-A Variable(2) $ 2,215,203.63 October 25, 2037 II-10-B Variable(2) $ 2,215,203.63 October 25, 2037 II-11-A Variable(2) $ 2,461,089.95 October 25, 2037 II-11-B Variable(2) $ 2,461,089.95 October 25, 2037 II-12-A Variable(2) $ 8,232,707.13 October 25, 2037 II-12-B Variable(2) $ 8,232,707.13 October 25, 2037 II-13-A Variable(2) $ 9,358,629.55 October 25, 2037 II-13-B Variable(2) $ 9,358,629.55 October 25, 2037 II-14-A Variable(2) $ 4,741,407.11 October 25, 2037 II-14-B Variable(2) $ 4,741,407.11 October 25, 2037 II-15-A Variable(2) $ 4,396,843.20 October 25, 2037 II-15-B Variable(2) $ 4,396,843.20 October 25, 2037 II-16-A Variable(2) $ 4,047,387.21 October 25, 2037 II-16-B Variable(2) $ 4,047,387.21 October 25, 2037 II-17-A Variable(2) $ 2,698,138.27 October 25, 2037 II-17-B Variable(2) $ 2,698,138.27 October 25, 2037 II-18-A Variable(2) $ 1,730,874.11 October 25, 2037 II-18-B Variable(2) $ 1,730,874.11 October 25, 2037 II-19-A Variable(2) $ 1,683,995.52 October 25, 2037 II-19-B Variable(2) $ 1,683,995.52 October 25, 2037 II-20-A Variable(2) $ 1,638,447.90 October 25, 2037 II-20-B Variable(2) $ 1,638,447.90 October 25, 2037 II-21-A Variable(2) $ 1,594,192.56 October 25, 2037 II-21-B Variable(2) $ 1,594,192.56 October 25, 2037 II-22-A Variable(2) $ 1,611,788.79 October 25, 2037 II-22-B Variable(2) $ 1,611,788.79 October 25, 2037 II-23-A Variable(2) $ 1,564,231.07 October 25, 2037 II-23-B Variable(2) $ 1,564,231.07 October 25, 2037 II-24-A Variable(2) $ 1,638,182.61 October 25, 2037 II-24-B Variable(2) $ 1,638,182.61 October 25, 2037 II-25-A Variable(2) $ 16,423,381.12 October 25, 2037 II-25-B Variable(2) $ 16,423,381.12 October 25, 2037 II-26-A Variable(2) $ 5,607,606.37 October 25, 2037 II-26-B Variable(2) $ 5,607,606.37 October 25, 2037 II-27-A Variable(2) $ 747,213.43 October 25, 2037 II-27-B Variable(2) $ 747,213.43 October 25, 2037 II-28-A Variable(2) $ 729,819.28 October 25, 2037 II-28-B Variable(2) $ 729,819.28 October 25, 2037 II-29-A Variable(2) $ 712,861.43 October 25, 2037 II-29-B Variable(2) $ 712,861.43 October 25, 2037 II-30-A Variable(2) $ 696,329.15 October 25, 2037 II-30-B Variable(2) $ 696,329.15 October 25, 2037 II-31-B Variable(2) $ 680,210.01 October 25, 2037 II-32-A Variable(2) $ 664,493.66 October 25, 2037 II-32-B Variable(2) $ 664,493.66 October 25, 2037 II-33-A Variable(2) $ 649,169.03 October 25, 2037 II-33-B Variable(2) $ 649,169.03 October 25, 2037 II-34-A Variable(2) $ 634,225.76 October 25, 2037 II-34-B Variable(2) $ 634,225.76 October 25, 2037 II-35-A Variable(2) $ 619,653.15 October 25, 2037 II-35-B Variable(2) $ 619,653.15 October 25, 2037 II-36-A Variable(2) $ 605,442.56 October 25, 2037 II-36-B Variable(2) $ 605,442.56 October 25, 2037 II-37-A Variable(2) $ 591,583.27 October 25, 2037 II-37-B Variable(2) $ 591,583.27 October 25, 2037 I-38-A Variable(2) $ 578,065.97 October 25, 2037 II-38-B Variable(2) $ 578,065.97 October 25, 2037 II-39-A Variable(2) $ 564,882.70 October 25, 2037 II-39-B Variable(2) $ 564,882.70 October 25, 2037 II-40-A Variable(2) $ 552,023.11 October 25, 2037 II-40-B Variable(2) $ 552,023.11 October 25, 2037 II-41-A Variable(2) $ 539,479.95 October 25, 2037 II-41-B Variable(2) $ 539,479.95 October 25, 2037 II-42-A Variable(2) $ 527,243.87 October 25, 2037 II-42-B Variable(2) $ 527,243.87 October 25, 2037 II-43-A Variable(2) $ 515,307.63 October 25, 2037 II-43-B Variable(2) $ 515,307.63 October 25, 2037 II-44-A Variable(2) $ 503,662.60 October 25, 2037 II-44-B Variable(2) $ 503,662.60 October 25, 2037 II-45-A Variable(2) $ 492,301.86 October 25, 2037 II-45-B Variable(2) $ 492,301.86 October 25, 2037 II-46-B Variable(2) $ 481,217.47 October 25, 2037 II-47-A Variable(2) $ 474,053.11 October 25, 2037 II-47-B Variable(2) $ 474,053.11 October 25, 2037 II-48-A Variable(2) $ 642,339.39 October 25, 2037 II-48-B Variable(2) $ 642,339.39 October 25, 2037 II-49-A Variable(2) $ 1,270,753.86 October 25, 2037 II-49-B Variable(2) $ 1,270,753.86 October 25, 2037 II-50-A Variable(2) $ 4,267,912.57 October 25, 2037 II-50-B Variable(2) $ 4,267,912.57 October 25, 2037 II-51-A Variable(2) $ 15,644,999.59 October 25, 2037 II-51-B Variable(2) $ 15,644,999.59 October 25, 2037 P Variable(2) $ 100.00 October 25, 2037 ________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-10 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 10 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class 1-A-1 Certificates, (ii) the Class 1-A-2A Certificates, (iii) the Class 1-A-2B Certificates, (iv) the Class 2-A Certificates, (v) the Class 3-A-1A Certificates, (vi) the Class 3 A 1B Certificates, (vii) the Class 4-A Certificates, (viii) the Class X-1 Certificates, (ix) the Class X-2 Certificates, (x) the Class X-3 Certificates, (xi) the Class A-R Certificates, (xii) the Class B-1 Certificates, (xiii) the Class B-2 Certificates, (xiv) the Class B-3 Certificates, (xv) the Class B-4 Certificates, (xvi) the Class B-5 Certificates, (xvii) the Class B-6 Certificates, (xviii) the Class P Certificate and (xix) the Class Y Certificate. REMIC I As provided herein, the Trustee will shall elect to treat that the segregated pool Trust Fund be treated for federal income tax purposes as comprising three real estate mortgage investment conduits (each, a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC”). Each Certificate, other than the Class P, Class Y and Class A-R Certificates, shall represent ownership of assets contained a regular interest in the Upper-Tier REMIC, as described herein. Each of the Class P and Class Y Certificates represents an interest in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a but does not represent an interest in any REMIC for federal income tax purposes, designated as "REMIC I"created hereunder. For purposes of the REMIC Provisions, Component I of the The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in REMIC I. Component I each REMIC. The Class Y Certificates, which will not have a Class Principal Balance and will not accrue interest, will only be entitled to received on any Distribution Date the excess, if any, of amounts paid with respect to the Yield Maintenance Agreement in excess of the Yield Maintenance Distributable Amount for the Yield Maintenance Agreement. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund and the interests in any REMIC formed hereby. The Middle-Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Upper-Tier REMIC shall hold as assets the uncertificated Middle-Tier REMIC Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. Lower-Tier REMIC Interests The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial Class Principal Amount for each Class of Lower-Through Tier REMIC Interest: Lower Tier REMIC Class Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Class Principal Balance Related Loan Group Class LT-Group 1 (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 158,612,755.32 Group1 Class LT-Group 2 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 2) $ 115,245,188.61 Group 2 Class LT-SC2 (other than the Underlying 2) $ 89,961.50 Group V Certificates2 Class LT-Group 3 (3) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 279,719,560.29 Group 3 Class LT-SC3 (3) $ 218,359.19 Group 3 Class LT-Group 4 (4) $ 174,016,743.64 Group 4 Class LT-SC4 (4) $ 135,844.89 Group 4 Class LT-R (5) (5) N/A _________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of [ ] classes of certificates, designated as (i) [the Class 1-A1-A Certificates. REMIC I , (ii) the Class 1-A1-B Certificates, (iii) the Class 1-A1-C Certificates, (iv) the Class 1-AM Certificates, (v) the Class 2-A Certificates, (vi) the Class 1-M-1 Certificates, (vii) the Class 1-M-2 Certificates, (viii) the Class 1-M-3 Certificates, (ix) the Class 1-M-4 Certificates, (x) the Class 1-M-5 Certificates, (xi) the Class 1-M-6 Certificates, (xii) the Class 1-M-7 Certificates, (xiii) the Class 1-M-8 Certificates, (xiv) the Class 1-B Certificates, (xv) the Class 1-C Certificates, (xvi) the Class 2-C Certificates, (xvii) the Class 1-P Certificates, (xviii) the Class 2-P Certificates, and (xix) the Class R Certificates.] As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Loan Group 1 and certain other related assets (other than the Underlying Group V Certificates1 Net WAC Shortfall Reserve Fund, any related Servicer Prepayment Charge Payment Amounts, the Class M Interest Reserve Fund and, for the avoidance of doubt, the Group 1 Supplemental Interest Trust, the Group 1 Derivative Account, the Group 1 Interest Rate Swap Agreement, the Group 1 Cap Contracts and the Group 1 Collateral Account) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of Residual Interests in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the Uncertificated REMIC I 1 Regular Interests.Interests will be certificated. [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-11 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 11 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-three classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A1A Certificates, (iii) the Class 2-A1B Certificates, (iv) the Class 2-A2A Certificates, (v) the Class 2-A2B Certificates (vi) the Class 2-A3 Certificates, (vii) the Class 3-A1A Certificates, (viii) the Class 3-A1B Certificates, (ix) the Class 3-A2A Certificates, (x) the Class 3-A2B Certificates, (xi) the Class 3-A3 Certificates, (xii) the Class 3-A4 Certificates, (xii) the Class X-1 Certificates, (xiii) the Class X-2 Certificates, (xiv) the Class X-3 Certificates, (xv) the Class X-B Certificates, (xvi) the Class A-R Certificates, (xvii) the Class B-1 Certificates, (xviii) the Class B-2 Certificates, (xix) the Class B-3 Certificates, (xx) the Class B-4 Certificates, (xxi) the Class B-5 Certificates, (xxii) the Class B-6 Certificates and (xxiii) the Class Y Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund and the Yield Maintenance Account and the Yield Maintenance Agreements) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, (i) the Class 1-A, Class 2-A1A, Class 2-A1B, Class 2-A2A, Class 2-A2B, Class 2-A3, Class 3-A1A, Class 3-A1B, Class 3-A2A, Class 3-A2B, Class 3-A3, Class 3-A4, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC Provisions, Component I Basis Risk Reserve Fund as provided in Section 5.07. The owners of the Class X-1, Class X-2, Class X-3 and Class X-B Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreement, and the interests in the Lower-Tier REMIC formed hereby. The following table irrevocably sets forth Upper Tier REMIC shall hold as assets the designationuncertificated Lower-Tier REMIC Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as the "a REMIC regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interestsinterest.

PRELIMINARY STATEMENT. The Trustee on behalf of On June 24, 2004 the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, ClSeller formed T▇▇▇▇▇▇▇▇ ▇▇▇-A-1Mortgage Securities Trust 2004-2, Class IIIas a Delaware statutory trust (the “Trust”) pursuant to the Trust Agreement, dated June 24, 2004 (the “Original Trust Agreement”), among the Seller, the Trustee and the Delaware Trustee. The parties to this Agreement desire to amend and restate the Original Trust Agreement in its entirety, and, as evidenced by their signatures hereto, the Original Trust Agreement is hereby amended, restated and replaced in its entirety as of the date first written above by this Agreement. Through this Agreement, the Depositor intends to cause the issuance and sale of the Trust’s Mortgage Pass-A-2Through Certificates, Class IVSeries 2004-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 2 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. REMIC I The Certificates will consist of twelve classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class A-X Certificates, (vi) the Class A-R Certificate, (vii) the Class B-1 Certificates, (viii) the Class B-2 Certificates, (ix) the Class B-3 Certificates, (x) the Class B-4 Certificates, (xi) the Class B-5 Certificates and (xii) the Class B-6 Certificates. As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of (i) the Underlying Certificates Additional Collateral, (other than ii) the Underlying Group V CertificatesYield Maintenance Agreements, (iii) as a REMIC the Yield Maintenance Amount Account, (iv) the Yield Maintenance Payment Account, (v) the Auction Swap Agreement, (vi) the Available Funds Cap Reserve Fund, and (vii) the Separate Interest Trust) be treated for federal income tax purposespurposes as comprising four real estate mortgage investment conduits (each a “REMIC” or, in the alternative, REMIC 1, REMIC 2, REMIC 3 and REMIC 4; REMIC 4 also being referred to as the “Upper Tier REMIC”). Each Certificate, other than the Class A-X Certificate and the Class A-R Certificate represents ownership of a regular interest in the Upper Tier REMIC for purposes of the REMIC Provisions. The Class A-X Certificate represents ownership of two regular interests in the Upper Tier REMIC as described in note 2 of the table below for such REMIC. In addition, each Certificate, other than the Class A-R and the Class A-X Certificates, represents the right to receive payments with respect to Available Funds Cap Shortfalls pursuant to Sections 5.08 and 5.09 hereof. The Class A-R Certificate represents ownership of the sole class of residual interest in each of REMIC 1, REMIC 2, REMIC 3 and the Upper Tier REMIC for purposes of the REMIC Provisions. The Upper Tier REMIC shall hold as its assets the several classes of uncertificated Lower Tier Regular Interests in REMIC 3, and each such Lower Tier Regular Interest is hereby designated as "a regular interest in REMIC I"3 for purposes of the REMIC Provisions. For REMIC 3 shall hold as its assets the several classes of uncertificated Lower Tier Regular Interests in REMIC 2, and each such Lower Tier Regular Interest is hereby designated as a regular interest in REMIC 2. REMIC 2 shall hold as its assets the several classes of uncertificated Lower Tier Regular Interests in REMIC 1, and each such Lower Tier Regular Interest is hereby designated as a regular interest in REMIC 1. REMIC 1 shall hold as its assets the property of the Trust Fund other than the Lower Tier Regular Interests in REMIC 1, REMIC 2 and REMIC 3, the Additional Collateral, the Available Funds Cap Risk Reserve Fund, the Auction Swap Agreement, Yield Maintenance Agreements, the Yield Maintenance Amount Account, the Yield Maintenance Payment Account, and the Separate Interest Trust. The startup day for each REMIC created hereby for purposes of the REMIC Provisions is the Closing Date. In addition, for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled possible maturity date for each regular interest in each REMIC created hereby is the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsLatest Possible Maturity Date.

PRELIMINARY STATEMENT. The Trustee on behalf of Company intends to sell Mortgage Pass-Through Certificates (collectively, the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust"Certificates"), Series 2007-R8to be issued hereunder in multiple classes, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing which in the aggregate will evidence the entire beneficial ownership interest in the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Fund. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee REMIC Administrator will elect make an election to treat the entire segregated pool of assets contained described in the definition of Trust Fund, and subject to this Agreement (including the Mortgage Loans but excluding the Initial Monthly Payment Fund, the Yield Maintenance Agreement and any payments thereunder and the Reserve Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) and any payments therefrom), as a REMIC real estate mortgage investment conduit (the "REMIC") for federal income tax purposes, purposes and such segregated pool of assets will be designated as "REMIC II." The Uncertificated REMIC I Regular Interests will be ". For purposes of the regular interests" in REMIC Provisions, Component I of and the Class R R-I Certificates will represent ownership of be the sole class of "residual interests" in REMIC I. Component I for purposes of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate REMIC Provisions (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each ). A segregated pool of assets consisting of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby will be designated as "REMIC II," and the REMIC Administrator will make a separate REMIC election with respect thereto. The Class A-1 Certificates, Class A-2 Certificates, Class A-3 Certificates, Class A-4 Certificates, Class A-5 Certificates, Class A-6 Certificates, Class A-7 Certificates, Class A-8 Certificates, Class A-9 Certificates, Class A-10 Certificates, Class A-11 Certificates, Class A-12 Certificates, Class A-13 Certificates, Class A-14 Certificates, Class A-15 Certificates, Class A-16 Certificates, Class A-17 Certificates, Class A-P Certificates, Class M-1 Certificates, Class M-2 Certificates, Class M-3 Certificates, Class B-1 Certificates, Class B-2 Certificates, Class B-3 Certificates and the Uncertificated REMIC II Regular Interests Z will be "regular interests" in REMIC I. Solely II and the Class R-II Certificates will be the sole class of "residual interests" therein for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following REMIC Provisions. The Class A-V Certificates will represent the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of entire beneficial ownership interest in the Uncertificated REMIC II Regular Interests Z. The terms and provisions of the Standard Terms are hereby incorporated by reference herein as though set forth in full herein. If any term or provision contained herein shall conflict with or be inconsistent with any provision contained in the Standard Terms, the terms and provisions of this Series Supplement shall govern. Any cross-reference to a section of the Pooling and Servicing Agreement, to the extent the terms of the Standard Terms and Series Supplement conflict with respect to that section, shall be a cross-reference to the related section of the Series Supplement. All capitalized terms not otherwise defined herein shall have the meanings set forth in the Standard Terms. The Pooling and Servicing Agreement shall be dated as of the date of the Series Supplement. The following table sets forth the designation, type, Pass-Through Rate, aggregate Initial Certificate Principal Balance, Maturity Date, initial ratings and certain features for each Class of Certificates comprising the interests in the Trust Fund created hereunder. AGGREGATE INITIAL CERTIFICATE MOODY'S/ DESIGNATION ▇▇▇▇ BALANCE FEATURES(1) DATE POOR'S/FITCH DENOMINATIONS(2) Class A-1 (3) Variable $183,945,000 Super Senior/TAC/Accretion January 2037 Aaa/AAA/AAA $100,000.00 Rate Directed/Floater/Adjustable Rate Class A-2(3) Variable Notional Senior/Inverse Floater/ January 2037 Aaa/NA/AAA $1,000,000.00 Rate Interest Only/Adjustable Rate Class A-3 6.00% $1,000 Senior/Accrual/Accretion January 2037 Aaa/NA/AAA $1,000 Directed/Companion/Fixed Rate Class A-4 6.00% $15,000,000 Senior/Lockout/Fixed Rate January 2037 Aaa/AAA/AAA $100,000.00 Class A-5 6.00% $135,500,000 Super Senior/PAC/Fixed Rate January 2037 Aaa/NA/AAA $100,000.00 Class A-6 6.00% $2,890,000 Senior Support/PAC/Fixed Rate January 2037 Aa1/NA/AAA $100,000.00 Class A-7 6.00% $82,000,000 Senior/Lockout/Fixed Rate January 2037 Aaa/NA/AAA $100,000.00 Class A-8 6.00% $6,900,000 Senior Support/Lockout/Fixed Rate January 2037 Aa1/NA/AAA $100,000.00 Class A-9 6.00% $4,436,000 Senior/Retail/Fixed Rate January 2037 Aaa/NA/AAA $1,000 Class A-10 6.00% $25,000,000 Super Senior/PAC/Fixed Rate January 2037 Aaa/NA/AAA $100,000.00 Class A-11 6.00% $2,000,000 Super Senior/Senior January 2037 $100,000.00 Support/PAC/Fixed Rate Aa1/NA/AAA Class A-12 6.00% $25,000,000 Super Senior/PAC/Fixed Rate January 2037 Aaa/NA/AAA $100,000.00 Class A-13 6.00% $1,565,625 Senior Support/PAC/Fixed Rate January 2037 Aa1/NA/AAA $100,000.00 Class A-14 6.00% $5,423,510 Senior/PAC/Fixed Rate January 2037 Aaa/AAA/AAA $100,000.00 Class A-15 6.00% $7,500,000 Senior/PAC/Fixed Rate January 2037 Aaa/NA/AAA $100,000.00 Class A-16 6.00% $3,310,865 Senior Support/PAC/Fixed Rate January 2037 Aa1/NA/AAA $100,000.00 Class A-17 6.00% $1,000 Senior/Accrual/Companion/Fixed January 2037 $1,000 Rate Aaa/NA/AAA Class A-P 0.00% $2,458,385 Senior/Principal Only January 2037 Aaa/NA/AAA $100,000.00 Class A-V Variable Notional Senior/Interest Only/Variable Rate January 2037 Aaa/NA/AAA $2,000,000.00 Rate Class R-I Regular Interests.6.00% $100.00 Senior/Residual/Fixed Rate January 2037 Aaa/NA/AAA (4) Class R-II 6.00% $100.00 Senior/Residual/Fixed Rate January 2037 Aaa/NA/AAA (4) Class M-1 6.00% $11,234,500 Mezzanine/Fixed Rate January 2037 NA/NA/AA $100,000.00 Class M-2 6.00% $3,135,200 Mezzanine/Fixed Rate January 2037 NA/NA/A $250,000.00 Class M-3 6.00% $2,090,100 Mezzanine/Fixed Rate January 2037 NA/NA/BBB $250,000.00 Class B-1 6.00% $1,045,000 Subordinate/Fixed Rate January 2037 NA/NA/BB $250,000.00 Class B-2 6.00% $1,045,100 Subordinate/Fixed Rate January 2037 NA/NA/B $250,000.00 Class B-3 6.00% $1,045,088 Subordinate/Fixed Rate January 2037 NA/NA/NA $250,000.00 ________________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class A1-A Certificates, (ii) the Class A1-B Certificates, (iii) the Class A1-C Certificates, (iv) the Class AM Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class B Certificates, (xiv) the Class C Certificates, (xv) the Class P Certificates and (xvi) the Class R Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets (other than the Underlying Group V CertificatesNet WAC Shortfall Reserve Fund, any Master Servicer Prepayment Charge Payment Amounts, the Pre-Funding Account, the Interest Coverage Account, the Class M Interest Reserve Fund and, for the avoidance of doubt, the Supplemental Interest Trust, the Derivative Account, the Cap Contracts, the Collateral Account and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of Residual Interests in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury Regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-1-A Variable(2) $ 1,291,504.09 September 25, 2037 1-1-B Variable(2) $ 1,291,504.09 September 25, 2037 1-2-A Variable(2) $ 2,392,637.16 September 25, 2037 1-2-B Variable(2) $ 2,392,637.16 September 25, 2037 1-3-A Variable(2) $ 3,515,987.98 September 25, 2037 1-3-B Variable(2) $ 3,515,987.98 September 25, 2037 1-4-A Variable(2) $ 4,652,077.16 September 25, 2037 1-4-B Variable(2) $ 4,652,077.16 September 25, 2037 1-5-A Variable(2) $ 5,790,398.31 September 25, 2037 1-5-B Variable(2) $ 5,790,398.31 September 25, 2037 1-6-A Variable(2) $ 6,916,224.67 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-6-B Variable(2) $ 6,916,224.67 September 25, 2037 1-7-A Variable(2) $ 8,020,326.33 September 25, 2037 1-7-B Variable(2) $ 8,020,326.33 September 25, 2037 1-8-A Variable(2) $ 9,083,173.44 September 25, 2037 1-8-B Variable(2) $ 9,083,173.44 September 25, 2037 1-9-A Variable(2) $ 10,058,672.05 September 25, 2037 1-9-B Variable(2) $ 10,058,672.05 September 25, 2037 1-10-A Variable(2) $ 10,765,542.83 September 25, 2037 1-10-B Variable(2) $ 10,765,542.83 September 25, 2037 1-11-A Variable(2) $ 11,463,933.03 September 25, 2037 1-11-B Variable(2) $ 11,463,933.03 September 25, 2037 1-12-A Variable(2) $ 11,644,488.25 September 25, 2037 1-12-B Variable(2) $ 11,644,488.25 September 25, 2037 1-13-A Variable(2) $ 11,067,336.89 September 25, 2037 1-13-B Variable(2) $ 11,067,336.89 September 25, 2037 1-14-A Variable(2) $ 10,518,483.57 September 25, 2037 1-14-B Variable(2) $ 10,518,483.57 September 25, 2037 1-15-A Variable(2) $ 9,996,426.10 September 25, 2037 1-15-B Variable(2) $ 9,996,426.10 September 25, 2037 1-16-A Variable(2) $ 9,499,998.27 September 25, 2037 1-16-B Variable(2) $ 9,499,998.27 September 25, 2037 1-17-A Variable(2) $ 9,027,876.59 September 25, 2037 1-17-B Variable(2) $ 9,027,876.59 September 25, 2037 1-18-A Variable(2) $ 8,578,837.10 September 25, 2037 1-18-B Variable(2) $ 8,578,837.10 September 25, 2037 1-19-A Variable(2) $ 8,151,847.46 September 25, 2037 1-19-B Variable(2) $ 8,151,847.46 September 25, 2037 1-20-A Variable(2) $ 7,798,892.21 September 25, 2037 1-20-B Variable(2) $ 7,798,892.21 September 25, 2037 1-21-A Variable(2) $ 7,396,029.40 September 25, 2037 1-21-B Variable(2) $ 7,396,029.40 September 25, 2037 1-22-A Variable(2) $ 7,016,763.42 September 25, 2037 1-22-B Variable(2) $ 7,016,763.42 September 25, 2037 1-23-A Variable(2) $ 6,425,008.72 September 25, 2037 1-23-B Variable(2) $ 6,425,008.72 September 25, 2037 1-24-A Variable(2) $ 3,611,587.50 September 25, 2037 1-24-B Variable(2) $ 3,611,587.50 September 25, 2037 1-25-A Variable(2) $ 3,502,440.00 September 25, 2037 1-25-B Variable(2) $ 3,502,440.00 September 25, 2037 1-26-A Variable(2) $ 3,396,127.50 September 25, 2037 1-26-B Variable(2) $ 3,396,127.50 September 25, 2037 1-27-A Variable(2) $ 3,293,460.00 September 25, 2037 1-27-B Variable(2) $ 3,293,460.00 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Latest Possible Maturity Date (1) 1-28-A Variable(2) $ 3,193,627.50 September 25, 2037 1-28-B Variable(2) $ 3,193,627.50 September 25, 2037 1-29-A Variable(2) $ 3,096,832.50 September 25, 2037 1-29-B Variable(2) $ 3,096,832.50 September 25, 2037 1-30-A Variable(2) $ 3,003,075.00 September 25, 2037 1-30-B Variable(2) $ 3,003,075.00 September 25, 2037 1-31-A Variable(2) $ 2,911,950.00 September 25, 2037 1-31-B Variable(2) $ 2,911,950.00 September 25, 2037 1-32-A Variable(2) $ 2,823,862.50 September 25, 2037 1-32-B Variable(2) $ 2,823,862.50 September 25, 2037 1-33-A Variable(2) $ 2,738,205.00 September 25, 2037 1-33-B Variable(2) $ 2,738,205.00 September 25, 2037 1-34-A Variable(2) $ 2,654,977.50 September 25, 2037 1-34-B Variable(2) $ 2,654,977.50 September 25, 2037 1-35-A Variable(2) $ 2,574,585.00 September 25, 2037 1-35-B Variable(2) $ 2,574,585.00 September 25, 2037 1-36-A Variable(2) $ 20,079,787.50 September 25, 2037 1-36-B Variable(2) $ 20,079,787.50 September 25, 2037 1-37-A Variable(2) $ 1,882,755.00 September 25, 2037 1-37-B Variable(2) $ 1,882,755.00 September 25, 2037 1-38-A Variable(2) $ 1,825,582.50 September 25, 2037 1-38-B Variable(2) $ 1,825,582.50 September 25, 2037 1-39-A Variable(2) $ 1,770,300.00 September 25, 2037 1-39-B Variable(2) $ 1,770,300.00 September 25, 2037 1-40-A Variable(2) $ 1,716,435.00 September 25, 2037 1-40-B Variable(2) $ 1,716,435.00 September 25, 2037 1-41-A Variable(2) $ 1,664,460.00 September 25, 2037 1-41-B Variable(2) $ 1,664,460.00 September 25, 2037 1-42-A Variable(2) $ 1,613,745.00 September 25, 2037 1-42-B Variable(2) $ 1,613,745.00 September 25, 2037 1-43-A Variable(2) $ 1,564,762.50 September 25, 2037 1-43-B Variable(2) $ 1,564,762.50 September 25, 2037 1-44-A Variable(2) $ 1,517,355.00 September 25, 2037 1-44-B Variable(2) $ 1,517,355.00 September 25, 2037 1-45-A Variable(2) $ 1,471,050.00 September 25, 2037 1-45-B Variable(2) $ 1,471,050.00 September 25, 2037 1-46-A Variable(2) $ 1,426,477.50 September 25, 2037 1-46-B Variable(2) $ 1,426,477.50 September 25, 2037 1-47-A Variable(2) $ 1,383,007.50 September 25, 2037 1-47-B Variable(2) $ 1,383,007.50 September 25, 2037 1-48-A Variable(2) $ 1,341,112.50 September 25, 2037 1-48-B Variable(2) $ 1,341,112.50 September 25, 2037 1-49-A Variable(2) $ 1,300,162.50 September 25, 2037 Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date (1) 1-49-B Variable(2) $ 1,300,162.50 September 25, 2037 1-50-A Variable(2) $ 1,260,630.00 September 25, 2037 1-50-B Variable(2) $ 1,260,630.00 September 25, 2037 1-51-A Variable(2) $ 1,222,357.50 September 25, 2037 1-51-B Variable(2) $ 1,222,357.50 September 25, 2037 1-52-A Variable(2) $ 1,185,030.00 September 25, 2037 1-52-B Variable(2) $ 1,185,030.00 September 25, 2037 1-53-A Variable(2) $ 1,148,962.50 September 25, 2037 1-53-B Variable(2) $ 1,148,962.50 September 25, 2037 1-54-A Variable(2) $ 1,113,997.50 September 25, 2037 1-54-B Variable(2) $ 1,113,997.50 September 25, 2037 1-55-A Variable(2) $ 1,080,135.00 September 25, 2037 1-55-B Variable(2) $ 1,080,135.00 September 25, 2037 1-56-A Variable(2) $ 1,047,217.50 September 25, 2037 1-56-B Variable(2) $ 1,047,217.50 September 25, 2037 1-57-A Variable(2) $ 1,015,245.00 September 25, 2037 1-57-B Variable(2) $ 1,015,245.00 September 25, 2037 1-58-A Variable(2) $ 984,375.00 September 25, 2037 1-58-B Variable(2) $ 984,375.00 September 25, 2037 1-59-A Variable(2) $ 954,292.50 September 25, 2037 1-59-B Variable(2) $ 954,292.50 September 25, 2037 1-60-A Variable(2) $ 30,051,630.00 September 25, 2037 1-60-B Variable(2) $ 30,051,630.00 September 25, 2037 P Variable(2) $ 100.00 September 25, 2037 OC Variable(2) $ 196,613,419.09 September 25, 2037 ________________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-AR4, DSLA Mortgage Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR4 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 2-A1A Certificates, (iii) the Class 2-A1B Certificates, (iv) the Class 2-A2A Certificates, (v) the Class 2-A2B Certificates, (vi) the Class X-1 Certificates, (vii) the Class X-2, (viii) the Class A-R Certificate, (ix) the Class B-1 Certificates, (x) the Class B-2 Certificates, (xi) the Class B-3 Certificates, (xii) the Class B-4 Certificates, (xiii) the Class B-5 Certificates, (xiv) the Class B-6 Certificates, (xv) the Class Y Certificates and (xvi) the Class C Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund, the Yield Maintenance Account, and the Yield Maintenance Agreements) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R, Class Y, and Class C Certificates shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Class 1-A1A, Class 2-A1A, Class 2-A1B, Class 2-A2A, Class 2-A2B, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5, and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls. The Class X-2 Certificates, in addition to representing beneficial ownership of REMIC I". For purposes regular interests, also represent beneficial ownership of the REMIC Provisions, Component I of Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent Certificate represents the ownership of the sole class of "residual interests" interest in REMIC I. Component I each of the Lower-Tier REMIC, the Middle-Tier REMIC, and the Upper-Tier REMIC. The Class R Y Certificates, which will not have a Class Principal Balance and will not accrue interest, will only be entitled to received on any Distribution Date the excess, if any, of amounts paid with respect to any Yield Maintenance Agreement in excess of the Yield Maintenance Distributable Amount for such Yield Maintenance Agreement. The Class Y Certificates will not bear represent an interest or have a principal amountin any REMIC. The following table irrevocably sets forth Class C Certificate shall represent a right to direct the designationtermination of the Trust but shall not represent an interest in any REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, the Uncertificated Pass-Through Rate (as defined herein) Yield Maintenance Account, the Yield Maintenance Agreements, and the initial Uncertificated Principal Balance (interests in any REMIC formed hereby. The Middle-Tier REMIC shall hold as defined herein) for assets the uncertificated Lower-Tier Interests in the Lower-Tier REMIC, other than the Class LT-R Interest, and each of the Uncertificated REMIC I Regular Interests (as defined herein), which are such Lower-Tier Interest is hereby designated as a regular interest in the "regular interests" Lower-Tier REMIC. The Upper-Tier REMIC shall hold as assets the uncertificated Middle-Tier Interests in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii)the Middle-Tier REMIC, the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been Class MT-R Interest, and each such Middle-Tier Interest is hereby designated as a regular interest in the "latest possible maturity date" for each of the Uncertificated REMIC I Regular InterestsMiddle-Tier REMIC.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass‑through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of fifteen classes of certificates, designated as (i) the Class A‑1 Certificates, (ii) the Class A‑2 Certificates, (iii) the Class A‑3 Certificates, (iv) the Class M‑1 Certificates, (v) the Class M‑2 Certificates, (vi) the Class M‑3 Certificates, (vii) the Class M‑4 Certificates, (viii) the Class M‑5 Certificates, (ix) the Class M‑6 Certificates, (x) the Class M‑7 Certificates, (xi) the Class B‑1 Certificates, (xii) the Class B‑2 Certificates, (xiii) the Class C Certificates, (xiv) the Class P Certificates and (xv) the Class R Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Cap Account, the Cap Agreement and the Master Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R‑1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G‑1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. AA 521,967,096.26 Variable2 May, 2036 A1 2,607,930.00 Variable2 May, 2036 A2 749,970.00 Variable2 May, 2036 A3 199,990.00 Variable2 May, 2036 M1 580,560.00 Variable2 May, 2036 M2 141,140.00 Variable2 May, 2036 M3 258,320.00 Variable2 May, 2036 M4 106,530.00 Variable2 May, 2036 M5 125,160.00 Variable2 May, 2036 M6 90,550.00 Variable2 May, 2036 M7 98,530.00 Variable2 May, 2036 B-1 151,800.00 Variable2 May, 2036 B-2 90,550.00 Variable2 May, 2036 ZZ 5,451,359.72 Variable2 May, 2036 P 100.00 Variable2 May, 2036 1 Solely for purposes of Section 1.860G-1(a)(4)(iii)) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled month of the maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass-Through Rate” herein. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 2.” The Class R-2 Interest represents the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 2 and each class of uncertificated “regular interests” in REMIC 2: A-1 $260,793,000.00 Variable2 May, 2036 A-2 74,997,000.00 Variable2 May, 2036 A-3 19,999,000.00 Variable2 May, 2036 M‑1 58,056,000.00 Variable2 May, 2036 M‑2 14,114,000.00 Variable2 May, 2036 M‑3 25,832,000.00 Variable2 May, 2036 M‑4 10,653,000.00 Variable2 May, 2036 M‑5 12,516,000.00 Variable2 May, 2036 M‑6 9,055,000.00 Variable2 May, 2036 M‑7 9,853,000.00 Variable2 May, 2036 B‑1 15,180,000.00 Variable2 May, 2036 B‑2 9,055,000.00 Variable2 May, 2036 C3 12,516,485.98 Variable2 May, 2036 P 100.00 N/A4 May, 2036 ___________________ 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each Class of Certificates. 2 Calculated in accordance with the definition of “Pass-Through Rate” herein. 3 The Class C Certificates will accrue interest at their variable Pass-Through Rate on their Notional Amount outstanding from time to time, which shall equal the aggregate of the Uncertificated Principal Balances of the REMIC I 1 Regular Interests. The Class C Certificates will not accrue interest on their Uncertificated Principal Balance. 4 The Class P Certificates will not accrue interest.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class II-A-1 Certificates, (iii) the Class II-A-2 Certificates, (iv) the Class II-A-3 Certificates, (v) the Class II-A-4 Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class M-11 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xvix) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Group I Mortgage Loans, the Group II Mortgage Loans and certain other related assets subject to this Agreement (other than but exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Master Servicer Prepayment Charge Payment Amounts, the Swap Account and the Interest Rate Swap Agreement) as a REMIC real estate investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the Uncertificated REMIC I 1 Regular Interests.. None of the REMIC 1 Regular Interests will be certificated. I Variable $ 36,457,680.32 January 2036 I-1-A Variable $ 23,099,640.00 January 2036 I-1-B Variable $ 23,099,640.00 January 2036 I-2-A Variable $ 27,947,357.50 January 2036 I-2-B Variable $ 27,947,357.50 January 2036 I-3-A Variable $ 32,736,901.25 January 2036 I-3-B Variable $ 32,736,901.25 January 2036 I-4-A Variable $ 37,421,968.75 January 2036 I-4-B Variable $ 37,421,968.75 January 2036 I-5-A Variable $ 41,954,925.00 January 2036 I-5-B Variable $ 41,954,925.00 January 2036 I-6-A Variable $ 46,286,948.75 January 2036 I-6-B Variable $ 46,286,948.75 January 2036 I-7-A Variable $ 50,368,903.75 January 2036 I-7-B Variable $ 50,368,903.75 January 2036 I-8-A Variable $ 54,126,473.75 January 2036 I-8-B Variable $ 54,126,473.75 January 2036 I-9-A Variable $ 54,051,031.25 January 2036 I-9-B Variable $ 54,051,031.25 January 2036 I-10-A Variable $ 51,546,743.75 January 2036 I-10-B Variable $ 51,546,743.75 January 2036 I-11-A Variable $ 49,150,301.25 January 2036 I-11-B Variable $ 49,150,301.25 January 2036 I-12-A Variable $ 46,866,570.00 January 2036 I-12-B Variable $ 46,866,570.00 January 2036 I-13-A Variable $ 44,690,212.50 January 2036 I-13-B Variable $ 44,690,212.50 January 2036 I-14-A Variable $ 42,616,127.50 January 2036 I-14-B Variable $ 42,616,127.50 January 2036 I-15-A Variable $ 40,639,418.75 January 2036 I-15-B Variable $ 40,639,418.75 January 2036 I-16-A Variable $ 38,758,293.75 January 2036 I-16-B Variable $ 38,758,293.75 January 2036 I-17-A Variable $ 36,967,147.50 January 2036 I-17-B Variable $ 36,967,147.50 January 2036 I-18-A Variable $ 35,264,071.25 January 2036 I-18-B Variable $ 35,264,071.25 January 2036 I-19-A Variable $ 33,953,441.25 January 2036 I-19-B Variable $ 33,953,441.25 January 2036 I-20-A Variable $ 70,592,941.25 January 2036 I-20-B Variable $ 70,592,941.25 January 2036 I-21-A Variable $ 85,972,655.00 January 2036 I-21-B Variable $ 85,972,655.00 January 2036 I-22-A Variable $ 71,862,706.25 January 2036 I-22-B Variable $ 71,862,706.25 January 2036 I-23-A Variable $ 60,008,702.50 January 2036 I-23-B Variable $ 60,008,702.50 January 2036 I-24-A Variable $ 34,223,337.50 January 2036 I-24-B Variable $ 34,223,337.50 January 2036 I-25-A Variable $ 19,266,568.75 January 2036 I-25-B Variable $ 19,266,568.75 January 2036 I-26-A Variable $ 18,194,422.50 January 2036 I-26-B Variable $ 18,194,422.50 January 2036 I-27-A Variable $ 17,227,297.50 January 2036 I-27-B Variable $ 17,227,297.50 January 2036 I-28-A Variable $ 16,313,706.25 January 2036 I-28-B Variable $ 16,313,706.25 January 2036 I-29-A Variable $ 15,450,972.50 January 2036 I-29-B Variable $ 15,450,972.50 January 2036 I-30-A Variable $ 14,635,982.50 January 2036 I-30-B Variable $ 14,635,982.50 January 2036 I-31-A Variable $ 13,866,007.50 January 2036 I-31-B Variable $ 13,866,007.50 January 2036 I-32-A Variable $ 13,138,326.25 January 2036 I-32-B Variable $ 13,138,326.25 January 2036 I-33-A Variable $ 12,450,007.50 January 2036 I-33-B Variable $ 12,450,007.50 January 2036 I-34-A Variable $ 11,800,291.25 January 2036 I-34-B Variable $ 11,800,291.25 January 2036 I-35-A Variable $ 11,186,247.50 January 2036 I-35-B Variable $ 11,186,247.50 January 2036 I-36-A Variable $ 10,605,783.75 January 2036 I-36-B Variable $ 10,605,783.75 January 2036 I-37-A Variable $ 10,056,988.75 January 2036 I-37-B Variable $ 10,056,988.75 January 2036 I-38-A Variable $ 9,538,071.25 January 2036 I-38-B Variable $ 9,538,071.25 January 2036 I-39-A Variable $ 9,047,342.50 January 2036 I-39-B Variable $ 9,047,342.50 January 2036 I-40-A Variable $ 8,583,208.75 January 2036 I-40-B Variable $ 8,583,208.75 January 2036 I-41-A Variable $ 8,144,183.75 January 2036 I-41-B Variable $ 8,144,183.75 January 2036 I-42-A Variable $ 7,728,843.75 January 2036 I-42-B Variable $ 7,728,843.75 January 2036 I-43-A Variable $ 154,382,580.00 January 2036 I-43-B Variable $ 154,382,580.00 January 2036 P Variable $ 100.00 January 2036

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-AR3, DSLA Mortgage Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR3 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of fifteen classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 1-A1B Certificates, (iii) the Class 2-A1 Certificates, (iv) the Class 2-A2A Certificates, (v) the Class 2-A2B Certificates, (vi) the Class X Certificates, (vii) the Class A-R Certificates, (viii) the Class B-1 Certificates, (ix) the Class B-2 Certificates, (x) the Class B-3 Certificates, (xi) the Class B-4 Certificates, (xii) the Class B-5 Certificates, (xiii) the Class B-6 Certificates, (xiv) the Class Y Certificates and (xv) the Class C Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund, the Yield Maintenance Account, and the Yield Maintenance Agreement) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R, Class Y, and Class C Certificates shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Class 2-A2A, Class 2-A2B, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5, and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls. The Class X Certificates, in addition to representing beneficial ownership of REMIC I". For purposes regular interests, also represent beneficial ownership of the REMIC Provisions, Component I of Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent Certificate represents the ownership of the sole class of "residual interests" interest in REMIC I. Component I each of the Lower-Tier REMIC and the Upper-Tier REMIC. The Class R Y Certificates, which will not have a Class Principal Balance and will not accrue interest, will only be entitled to received on any Distribution Date the excess, if any, of amounts paid with respect to the Yield Maintenance Agreement in excess of the Yield Maintenance Distributable Amount for such Yield Maintenance Agreement. The Class Y Certificates will not bear represent an interest or have in any REMIC. The Class C Certificate shall represent a principal amountright to direct the termination of the Trust but shall not represent an interest in any REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreement, and the interests in the Lower-Tier REMIC formed hereby. The Upper Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Class Principal Balance (as defined herein) Amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: LT1-A1A (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 50,000,000.00 Class 1-A1A LT1-A1B (other than the Underlying 1) $ 5,555,500.00 Class 1-A1B LT2-A1 (1) $ 62,500,000.00 Class 2-A1 LT2-A2A (1) $ 84,823,000.00 Class 2-A2A LT2-A2B (1) $ 21,205,750.00 Class 2-A2B LTA-R (1) $ 25.00 Class A-R LTB-6 (1) $ 728,066.43 Class B-6 LT-Group V Certificates1 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 59,879,892.62 N/A LT-SC-1 (2) $ 180,181.98 N/A LT-Group 2 (3) $ 181,646,686.15 N/A LT-SC-2 (3) $ 546,580.67 N/A LTQ (1) $ 484,506,682.86 N/A LT-R (4) (4) Class A-R __________________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty classes of certificates, designated as (i) the Class A-1A Certificates, (ii) the Class A-1B Certificates, (iii) the Class A-2 Certificates, (iv) the Class A-3 Certificates, (v) the Class A-4 Certificates, (vi) the Class A-5 Certificates, (vii) the Class A-6 Certificates, (viii) the Class M-1 Certificates, (ix) the Class M-2 Certificates, (x) the Class M-3 Certificates, (xi) the Class M-4 Certificates, (xii) the Class M-5 Certificates, (xiii) the Class M-6 Certificates, (xiv) the Class M-7 Certificates, (xv) the Class M-8 Certificates, (xvi) the Class M-9 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xviii) the Class R Certificates and (xx) the Class R-X Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Group I Mortgage Loans, the Group II Mortgage Loans and certain other related assets subject to this Agreement (other than but exclusive of the Underlying Group V CertificatesPre-Funding Accounts, the Net WAC Rate Carryover Reserve Account, the Master Servicer Prepayment Charge Payment Amounts and the Cap Contract) as a REMIC real estate investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC I Regular Interests.1 Pass-Through Rate Initial Uncertificated Principal Balance Assumed Final Maturity Date(1) LT1 Variable(2) $ 645,800,516.75 May 2035 LT1PF Variable(2) $ 135,623,061.81 May 2035 LT2 Variable(2) $ 344,188,833.70 May 2035 LT2PF Variable(2) $ 74,387,487.74 May 2035 LTP Variable(2) $ 100.00 May 2035 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2004-8 Mortgage Loan Pass-Through Certificates, Series 20072004-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 8 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of seventeen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A1 Certificates, (iii) the Class 2-A2 Certificates, (iv) the Class 2-A3 Certificates, (v) the Class 2-A4A Certificates, (vi) the Class 2-A4B Certificates, (vii) the Class 3-A1 Certificates, (viii) the Class 3-A2 Certificates, (ix) the Class X Certificates, (x) the Class A-R Certificates, (xi) the Class B-1 Certificates, (xii) the Class B-2 Certificates, (xiii) the Class B-3 Certificates, (xiv) the Class B-4 Certificates, (xv) the Class B-5 Certificates, (xvi) the Class B-6 Certificates and (xvii) the Class Y Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund, the Yield Maintenance Account and the Class 1-A Basis Risk Account) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, (i) the Class 1-A, Class 2-A2, Class 2-A3, Class 2-A4A, Class 2-A4B, Class 3-A2, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and Class B-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC ProvisionsBasis Risk Reserve Fund as provided in Section 5.07, Component I (ii) the Class 2-A3, Class 2-A4A, Class 2-A4B and Class 3-A2 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 4.04 and (iii) the Class 1-A Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Class 1-A Basis Risk Account as provided in Section 4.05. The owners of the Class X Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Class 1-A Basis Risk Account, and the interests in the Lower-Tier REMIC formed hereby. The Upper Tier REMIC shall hold as assets the uncertificated Lower-Tier REMIC Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, and the initial Uncertificated Class Principal Balance (as defined herein) Amount for each Class of the Uncertificated Lower-Tier REMIC I Regular Interests Interest: LT1-A (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 110,995,250.00 Class 1-A LT2-A1 (other than the Underlying 1) $ 25,000,000.00 Class 2-A1 LT2-A2 (1) $ 50,000,000.00 Class 2-A2 LT2-A3 (1) $ 31,250,000.00 Class 2-A3 LT2-A4A (1) $ 59,006,500.00 Class 2-A4A LT2-A4B (1) $ 10,413,000.00 Class 2-A4B LT3-A1 (1) $ 16,176,750.00 Class 3-A1 LT3-A2 (1) $ 25,000,000.00 Class 3-A2 LTA-R (1) $ 25.00 Class A-R LTB-6 (1) $ 1,231,800.79 Class B-6 LT-Group V Certificates1 (2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 118,647,290.45 N/A LT-SC-1 (2) $ 318,835.02 N/A LT-Group 2 (3) $ 187,780,038.44 N/A LT-SC-2 (3) $ 504,605.77 N/A LT-Group 3 (4) $ 44,015,523.86 N/A LT-SC-3 (4) $ 118,282.24 N/A LTQ (1) $ 702,769,151.57 N/A LT-R (5) (5) Class A-R __________________________

PRELIMINARY STATEMENT. The Trustee on behalf Pursuant to this Agreement, the Depositor intends to cause the issuance and sale of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust’s Mortgage Pass-Through Certificates, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 5 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). On or prior to the Closing Date, the Depositor acquired the Mortgage Loans from the Seller pursuant to the Mortgage Loan Purchase Agreement (as defined below). On the Closing Date, the Depositor will sell the Mortgage Loans and certain other property to the Trust and receive in consideration therefor the Certificates evidencing the entire beneficial ownership of the Trust. The Depositor intends to sell some and deliver to the Seller or all of its designee the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained be issued hereunder in multiple classes, which in the Trust Fund consisting aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-seven classes of certificates, designated as (i) the Underlying Class 1A-1 Certificates, (ii) the Class 1A-2 Certificates, (iii) the Class 1-AX certificates, (iv) the Class 2A-1 Certificates, (v) the Class 2-AX Certificates, (vi) the Class 3A-1 Certificates, (vii) the Class 3A-2 Certificates, (viii) the Class 3A-3 Certificates, (ix) the Class 3A-4 Certificates, (x) the Class 3AX-1 Certificates, (xi) the Class 3AX-2 Certificates, (xii) the Class 4A-1 Certificates, (xiii) the Class 4-AX Certificates, (xiv) the Class A-R Certificate, (xv) the Class 4A-R Certificates, (xvi) the Class B-1 Certificates, (xvii) the Class B-2 Certificates, (xviii) the Class B-3 Certificates, (xix) the Class B-4 Certificates, (xx) the Class B-5 Certificates, (xxi) the Class B-6 Certificates, (xxii) the Class 4B-1 Certificates, (xxiii) the Class 4B-2 Certificates, (xxiv) the Class 4B-3 Certificates, (xxv) the Class 4B-4 Certificates, (xxvi) the Class 4B-5 Certificates and (other than xxvii) the Underlying Group V Class 4B-6 Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund comprises five REMICs: two lower-tier REMICs (“Lower-Tier REMIC 1-3” and “Lower-Tier REMIC 4”); one middle-tier REMIC (“Middle-Tier REMIC 1-3”); and two upper-tier REMICs (“Upper-Tier REMIC 1-3” and “Upper-Tier REMIC 4”). Lower-Tier REMIC 1-3 will hold as "REMIC I". For purposes its assets all of the assets related to Loan Group 1, Loan Group 2, and Loan Group 3 and will issue interests (the “Lower-Tier 1-3 Regular Interests”), which will be uncertificated and will represent the regular interests in Lower Tier REMIC Provisions1-3, Component I and a residual interest (the “LT-R 1-3 Interest”), ownership of which will be evidenced by the Class A-R Certificates Certificate and which will represent ownership of the sole class of "residual interests" interest in Lower-Tier REMIC I. Component I 1-3. The Trustee will hold the Lower-Tier 1-3 Regular Interests as assets of the Middle-Tier REMIC 1-3, which will issue interests (the “Middle-Tier 1-3 Regular Interests”), which will be uncertificated an will represent the regular interests in Middle-Tier REMIC 1-3, and a residual interest (the “MT-R 1-3 Interest”), ownership of which will be evidenced by the Class A-R Certificate and which will represent the sole class of residual interest in Middle-Tier REMIC 1-3. The Trustee will hold the Middle-Tier REMIC 1-3 Regular Interests as assets of Upper-Tier REMIC 1-3. The Group 1 Certificates, other than the Class A-R Certificate, the Group 2 Certificates, the Group 3 Certificates, and the Subordinate Certificates will not bear represent regular interests in Upper-Tier REMIC 1-3, and the Class A-R Certificate will represent the residual interest Upper-Tier REMIC 1-3 as well as ownership of the LT-R 1-3 and MT-R 1-3 Interests. Lower-Tier REMIC 4 will hold as its assets all of the assets related to Loan Group 4, and will issue interests (the “Lower-Tier 4 Regular Interests”), which will be uncertificated and will represent the regular interests in Lower Tier REMIC 4, and a residual interest (the “LT-R 4 Interest”), ownership of which will be evidenced by the Class 4A-R Certificate and which will represent the sole class of residual interest in Lower-Tier REMIC 4. The Trustee will hold the Lower-Tier 4 Regular Interests as assets of Upper-Tier REMIC 4. The Group 4 Certificates, other than the Class 4A-R Certificates, will represent regular interests in Upper-Tier REMIC 4, and the Class 4A-R Certificate will represent the residual interest in Upper-Tier REMIC 4 as well as ownership of the LT-R 4 Interest. All REMIC regular and residual interests created hereby will be retired on or have a principal amount. before the Group 1-3 Latest Possible Maturity Date, in the case of the Lower-Tier 1-3 Regular Interests, the Middle-Tier 1-3 Regular Interests, and each class of regular interests in Upper-Tier REMIC 1-3, and, the Group 4 Latest Possible Maturity Date, in the case of the Lower-Tier 4 Regular Interests and the regular interests in Upper-Tier REMIC 4.. The following table irrevocably sets forth specifies the designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, initial principal amount, and the initial Uncertificated Principal Balance (as defined herein) related Loan Group for each of the Uncertificated REMIC I Lower-Tier 1-3 Regular Interests Interest: LT-Group 1 (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) (other than the Underlying 4) 1 LT-Group V Certificates1 SCA (1) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.(5) 1 LT-Group 2 (2) (6) 2 LT-Group 2 SCA (2) (7) 2 LT-Group 3 (3) (8) 3 LT-Group 3 SCA (3) (9) 3 LT-R 1-3 (10) (10) N/A __________________

PRELIMINARY STATEMENT. The Trustee on behalf of Company intends to sell Mortgage Pass-Through Certificates (collectively, the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust"Certificates"), Series 2007-R8to be issued hereunder in multiple classes, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund. As provided herein, the REMIC Administrator will make an election to treat the entire segregated pool of assets described in the definition of REMIC I (as defined herein), and subject to this Agreement (including the primary assets of which are the Underlying Certificates Mortgage Loans), as a real estate mortgage investment conduit (as defined herein). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the a "REMIC") for federal income tax purposes and such segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC for federal income tax purposes, will be designated as "REMIC II." The Uncertificated REMIC I Regular Interests will be ". For purposes of the regular interests" in REMIC Provisions, Component I of and the Class R R-I Certificates will represent ownership of be the sole class of "residual interests" in REMIC I. Component I for purposes of the REMIC Provisions (as defined herein). A segregated pool of assets consisting of the Uncertificated REMIC I Regular Interests will be designated as "REMIC II" and the REMIC Administrator will make a separate REMIC election with respect thereto. The Uncertificated REMIC II Regular Interests will be "regular interests" in REMIC II and the Class R R-II Certificates will be the sole class of "residual interests" in REMIC II for purposes of the REMIC Provisions. A segregated pool of assets consisting of the Uncertificated REMIC II Regular Interests will be designated as "REMIC III" and the REMIC Administrator will make a separate REMIC election with respect thereto. The Class 1-A-1 Certificates, Class 1-A-2 Certificates, Class 1-A-3 Certificates, Class 1-A-4 Certificates, Class 2-A-1 Certificates, Class 2-A-2 Certificates, Class 2-A-3 Certificates, Class 2-A-4 Certificates, Class 3-A-1 Certificates, Class 3-A-2 Certificates, Class 3-A-3 Certificates, Class 3-A-4 Certificates, Class 4-A-1 Certificates, Class 4-A-2 Certificates, Class 4-A-3 Certificates, Class 4-A-4 Certificates, Class 4-A-5 Certificates, Class 4-A-6 Certificates, Class 4-A-7 Certificates, Class 4-A-8 Certificates, Class 4-A-9 Certificates, Class 4-A- 10 Certificates, Class A-P Certificates, Class M-1 Certificates, Class M-2 Certificates, Class M-3 Certificates, Class B-1 Certificates, Class B-2 Certificates, Class B-3 Certificates, Uncertificated Class A-X-1 REMIC Regular Interests and Uncertificated Class A-X-2 REMIC Regular Interests will be "regular interests" in REMIC III and the Class R-III Certificates will be the sole class of "residual interests" therein for purposes of the REMIC Provisions. The Class A-X-1 and Class A-X- 2 Certificates will represent the entire beneficial ownership interest in the Uncertificated Class A-X- 1 REMIC Regular Interests and the Uncertificated Class A-X-2 REMIC Regular Interests, respectively. The terms and provisions of the Standard Terms are hereby incorporated by reference herein as though set forth in full herein. If any term or provision contained herein shall conflict with or be inconsistent with any provision contained in the Standard Terms, the terms and provisions of this Series Supplement shall govern. Any cross-reference to a section of the Pooling and Servicing Agreement, to the extent the terms of the Standard Terms and Series Supplement conflict with respect to that section, shall be a cross-reference to the related section of the Series Supplement. All capitalized terms not bear interest or otherwise defined herein shall have a principal amountthe meanings set forth in the Standard Terms. The Pooling and Servicing Agreement shall be dated as of the date of the Series Supplement. The following table irrevocably sets forth the designation, the Uncertificated Pass-REMIC I Pass- Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.. None of the Uncertificated REMIC I Regular Interests will be certificated. Initial Uncertificated Uncertificated ---Principal-Balance---- Latest --REMIC-I-Pass Possible-Maturity(1)- Designation Through Rate REMIC I Regular Interest LT-I-SUB 6.00% $ 811.57 December 25, 2032 REMIC I Regular Interest (2) LT-I-IO N/A (3) December 25, 2032 REMIC I Regular Interest LT-I-ZZZ 6.00% $318,251,932.43 December 25, 2032 REMIC I Regular Interest LT-II-SUB 6.00% $1,706.63 December 25, 2032 REMIC I Regular Interest (4) LT-II-IO N/A (3) December 25, 2032 REMIC I Regular Interest LT-II-ZZZ 6.00% $669,255,616.37 December 25, 2032 REMIC I Regular Interest LT-III-SUB 6.00% $577.44 December 25, 2032 REMIC I Regular Interest LT-III-PO 0.00% $ 229,726.88 December 25, 2032 REMIC I Regular Interest (5) LT-III-IO N/A (3) December 25, 2032 REMIC I Regular Interest LT-III-ZZZ 6.00% $226,141,794.56 December 25, 2032 REMIC I Regular Interest LT-IV-SUB 5.75% $ 582.12 December 25, 2032 REMIC I Regular Interest LT-IV-PO 0.00% $ 444,363.00 December 25, 2032 REMIC I Regular Interest (6) LT-IV-IO N/A (3) December 25, 2032 REMIC I Regular Interest 5.75% $227,809,863.88 December 25, 2032 LT-IV-ZZZ

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A-1 Certificates, (ii) the Class I- A-2 Certificates, (iii) the Class II-A-1 Certificates, (iv) the Class II-A-2 Certificates, (v) Class II-A-3 Certificates, (vi) the Class II-A-4 Certificates, (vii) the Class M-1 Certificates (viii) the Class M-2 Certificates, (ix) the Class M-3 Certificates, (x) the Class M-4 Certificates, (xi) the Class M-5 Certificates, (xii) the Class M-6 Certificates, (xiii) the Class M-7 Certificates, (xiv) the Class M-8 Certificates, (xv) the Class M-9 Certificates, (xvi) the Class M-10 Certificates, (xvii) the Class M-11 Certificates, (xviii) the Class C Certificates, (xix) the Class P Certificates, (xx) the Class R Certificates and (xxi) the Class R-X Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets (other than the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, the Serivicer Prepayment Charge Payment Amounts and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will be the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests will be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Assumed Final Maturity Date(1) I Regular Interests.Variable(2) $ 2,076.89 December 25, 2035 I-1-B Variable(2) $ 5,259,880.00 December 25, 2035 I-3-B Variable(2) $ 10,029,910.00 December 25, 2035 I-4-B Variable(2) $ 12,433,741.25 December 25, 2035 I-5-A Variable(2) $ 14,822,491.25 December 25, 2035 I-5-B Variable(2) $ 14,822,491.25 December 25, 2035 I-6-A Variable(2) $ 17,174,060.00 December 25, 2035 I-6-B Variable(2) $ 17,174,060.00 December 25, 2035 I-7-B Variable(2) $ 19,465,716.25 December 25, 2035 I-8-A Variable(2) $ 21,673,803.75 December 25, 2035 I-8-B Variable(2) $ 21,673,803.75 December 25, 2035 I-9-B Variable(2) $ 23,774,552.50 December 25, 2035 I-10-B Variable(2) $ 25,744,280.00 December 25, 2035 I-11-A Variable(2) $ 27,500,061.25 December 25, 2035 I-11-B Variable(2) $ 27,500,061.25 December 25, 2035 I-12-A Variable(2) $ 26,242,806.25 December 25, 2035 I-12-B Variable(2) $ 26,242,806.25 December 25, 2035 I-13-A Variable(2) $ 25,044,475.00 December 25, 2035 I-13-B Variable(2) $ 25,044,475.00 December 25, 2035 I-14-B Variable(2) $ 23,902,175.00 December 25, 2035 I-15-A Variable(2) $ 22,813,246.25 December 25, 2035 I-15-B Variable(2) $ 22,813,246.25 December 25, 2035 I-16-A Variable(2) $ 21,775,151.25 December 25, 2035 I-16-B Variable(2) $ 21,775,151.25 December 25, 2035 I-17-B Variable(2) $ 20,785,470.00 December 25, 2035 I-18-A Variable(2) $ 19,841,877.50 December 25, 2035 I-18-B Variable(2) $ 19,841,877.50 December 25, 2035 I-19-A Variable(2) $ 18,942,278.75 December 25, 2035 I-19-B Variable(2) $ 18,942,278.75 December 25, 2035 I-20-A Variable(2) $ 18,084,536.25 December 25, 2035 I-20-B Variable(2) $ 18,084,536.25 December 25, 2035 I-21-A Variable(2) $ 17,266,667.50 December 25, 2035 I-21-B Variable(2) $ 17,266,667.50 December 25, 2035 I-22-B Variable(2) $ 17,130,847.50 December 25, 2035 I-23-B Variable(2) $ 47,570,257.50 December 25, 2035 I-24-A Variable(2) $ 39,690,008.75 December 25, 2035 I-24-B Variable(2) $ 39,690,008.75 December 25, 2035 I-25-A Variable(2) $ 33,211,137.50 December 25, 2035 I-25-B Variable(2) $ 33,211,137.50 December 25, 2035 I-26-A Variable(2) $ 27,580,762.50 December 25, 2035 I-26-B Variable(2) $ 27,580,762.50 December 25, 2035 I-27-A Variable(2) $ 10,019,858.75 December 25, 2035 I-27-B Variable(2) $ 10,019,858.75 December 25, 2035 I-28-A Variable(2) $ 9,502,957.50 December 25, 2035 I-28-B Variable(2) $ 9,502,957.50 December 25, 2035 I-29-A Variable(2) $ 9,014,620.00 December 25, 2035 I-29-B Variable(2) $ 9,014,620.00 December 25, 2035 I-30-A Variable(2) $ 8,553,053.75 December 25, 2035 I-30-B Variable(2) $ 8,553,053.75 December 25, 2035 I-31-B Variable(2) $ 8,117,012.50 December 25, 2035 I-32-B Variable(2) $ 7,704,883.75 December 25, 2035 I-33-A Variable(2) $ 7,315,290.00 December 25, 2035 I-33-B Variable(2) $ 7,315,290.00 December 25, 2035 I-34-A Variable(2) $ 6,946,945.00 December 25, 2035 I-34-B Variable(2) $ 6,946,945.00 December 25, 2035 I-35-A Variable(2) $ 6,598,623.75 December 25, 2035 I-35-B Variable(2) $ 6,598,623.75 December 25, 2035 I-36-A Variable(2) $ 6,268,662.50 December 25, 2035 I-36-B Variable(2) $ 6,268,662.50 December 25, 2035 I-37-B Variable(2) $ 5,957,120.00 December 25, 2035 I-38-A Variable(2) $ 5,662,370.00 December 25, 2035 I-38-B Variable(2) $ 5,662,370.00 December 25, 2035 I-39-A Variable(2) $ 5,383,465.00 December 25, 2035 I-39-B Variable(2) $ 5,383,465.00 December 25, 2035 I-40-A Variable(2) $ 5,119,500.00 December 25, 2035 I-40-B Variable(2) $ 5,119,500.00 December 25, 2035 I-41-A Variable(2) $ 4,869,631.25 December 25, 2035 I-41-B Variable(2) $ 4,869,631.25 December 25, 2035 I-42-A Variable(2) $ 4,633,066.25 December 25, 2035 I-42-B Variable(2) $ 4,633,066.25 December 25, 2035 I-43-A Variable(2) $ 4,409,053.75 December 25, 2035 I-43-B Variable(2) $ 4,409,053.75 December 25, 2035 I-44-A Variable(2) $ 4,196,888.75 December 25, 2035 I-44-B Variable(2) $ 4,196,888.75 December 25, 2035 I-45-A Variable(2) $ 3,995,906.25 December 25, 2035 I-45-B Variable(2) $ 3,995,906.25 December 25, 2035 I-46-B Variable(2) $ 3,805,477.50 December 25, 2035 I-47-A Variable(2) $ 3,625,013.75 December 25, 2035 I-47-B Variable(2) $ 3,625,013.75 December 25, 2035 I-48-A Variable(2) $ 3,453,961.25 December 25, 2035 I-48-B Variable(2) $ 3,453,961.25 December 25, 2035 I-49-A Variable(2) $ 78,979,318.75 December 25, 2035 I-49-B Variable(2) $ 78,979,318.75 December 25, 2035 ________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the "Certificates"), to be issued hereunder in multiple Classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of eleven Classes of Certificates, designated as (i) the Class A-1, Class A-2 and Class A-IO Certificates, (ii) the Class M-1, Class M-2, Class M-3 and Class M-4 Certificates, (iii) the Class B Certificates, (iv) the Class CE Certificates, (v) the Class P Certificates and (vi) the Class R Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) as a REMIC be treated for federal income tax purposespurposes as six separate real estate mortgage investment conduits (each a "REMIC" or, designated as in the alternative, "REMIC IA," "REMIC B," "REMIC 1," "REMIC 2," REMIC 3" and "REMIC 4," respectively). For purposes of The Class T4-A1IO, Class T4-A2IO, Class T4-M1IO, Class T4-M2IO, Class T4-M3IO, Class T4-M4IO, Class T4-BIO, Class T4-4, Class T4-11, Class T4-12 and Class T4-13 Interests (such interests, the "REMIC Provisions4 Components"), Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of T4-A1, Class T4-A2, Class T4-M1, Class T4-M2, Class T4-M3, Class T4-M4 and Class T4-B Interests and the Class R A-IO Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each represent all of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely 4. Each Class of Offered P&I Certificates represents beneficial ownership of the corresponding REMIC 4 Regular Interest and the right to receive Cap Carryover Amounts. The Class CE Certificates represent beneficial ownership of the REMIC 4 Components, subject to the obligation to pay Cap Carryover Amounts. Each of the Class R-A, Class R-B, Class R-1, Class R-2, Class R-3 and Class R-4 Interests, represented collectively by the Class R Certificate, represents the sole Class of "residual interest" in REMIC A, REMIC B, REMIC 1, REMIC 2, REMIC 3 and REMIC 4, respectively, for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiithe REMIC Provisions. There are three Classes of uncertificated REMIC A Regular Interests (the Class TA-1, Class TA-2 and Class TA-4 Interests), four Classes of uncertificated REMIC B Regular Interests (the Distribution Date immediately following Class TB-1, Class TB-2, Class TB-AIO and Class TB-4 Interests), five Classes of uncertificated REMIC 1 Regular Interests (the latest scheduled maturity date for Class T1-1, Class T1-2, Class T1-3, Class T1-4 and Class T1-AIO Interests), eight Classes of uncertificated REMIC 2 Regular Interests (the Underlying Class T2-1, Class T2-2, Class T2-3, Class T2-4, Class T2-AIO, Class T2-11, Class T2-12 and Class T2-13 Interests), and twelve Classes of uncertificated REMIC 3 Regular Interests (the Class T3-A1, Class T3-A2, Class T3-M1, Class T3-M2, Class T3-M3, Class T3-M4, Class T3-B, Class T3-4, Class T3-AIO, Class T3-11, Class T3-12 and Class T3-13 Interests). Each Class of REMIC A Regular Interest, REMIC B Regular Interest, REMIC 1 Regular Interest, REMIC 2 Regular Interest, REMIC 3 Regular Interest and REMIC 4 Regular Interest and the Class A-IO Certificates (other than are "REMIC Regular Interests." The REMIC A Regular Interests will be held as assets of REMIC B. The REMIC B Regular Interests will be held as assets of REMIC 1. The REMIC 1 Regular Interests will be held as assets of REMIC 2, the Underlying Group V Certificates) has been designated REMIC 2 Regular Interests will be held as assets of REMIC 3 and the REMIC 3 Regular Interests will be held as assets of REMIC 4. The REMIC 4 Regular Interests will be held as assets of the Grantor Trust, which will also hold the rights of the Offered P&I Certificates to receive their respective Cap Carryover Amounts. The Class P Certificates represent an interest in a grantor trust created hereunder and are entitled to receive any Prepayment Charges with respect to the Mortgage Loans. The "latest possible maturity date" for federal income tax purposes of all interests created hereby will be the Distribution Date in August 2032. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance or Original Notional Amount, for each Class of Certificates comprising the Uncertificated REMIC I Regular Interests.interests in the Trust Fund created hereunder: ================================================================================ Original Class Certificate Principal or Notional Pass-Through Assumed Final Class Amount Rate Maturity Dates -------------------------------------------------------------------------------- A-1 $290,280,000.00 (1) April 25, 2032 -------------------------------------------------------------------------------- A-2 $95,892,000.00 (2) April 25, 2032 -------------------------------------------------------------------------------- A-IO $48,272,000.00 (3) N/A -------------------------------------------------------------------------------- M-1 $32,584,000.00 (4) March 25, 2032 -------------------------------------------------------------------------------- M-2 $28,963,000.00 (5) February 25, 2032 -------------------------------------------------------------------------------- M-3 $19,308,000.00 (6) December 25, 2031 -------------------------------------------------------------------------------- M-4 $8,448,000.00 (7) June 25, 2032 -------------------------------------------------------------------------------- B $3,620,000.00 (8) May 25, 2030 -------------------------------------------------------------------------------- CE (9) N/A N/A -------------------------------------------------------------------------------- P N/A N/A N/A -------------------------------------------------------------------------------- R N/A N/A N/A -------------------------------------------------------------------------------- Total $479,095,000.00(10) ================================================================================

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the DSLA Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-AR6 DSLA Mortgage Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates AR6 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class 1A-1A Certificates, (ii) the Class 1A-1B Certificates, (iii) the Class 2A-1A Certificates, (iv) the Class 2A-1B Certificates, (v) the Class 2A-1C Certificates, (vi) the Class C Certificates, (vii) the Class P Certificates (viii) the Class R Certificate, (ix) the Class M-1 Certificates, (x) the Class M-2 Certificates, (xi) the Class M-3 Certificates, (xii) the Class M-4 Certificates, (xiii) the Class M-5 Certificates, (xiv) the Class M-6 Certificates, (xv) the Class R-II Certificate and (xvi) the Class R-X Certificate. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund, the Yield Maintenance Account, and the Yield Maintenance Agreement) as a REMIC be treated for federal income tax purposespurposes as comprising four real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Upper-Tier REMIC,” the “Class C REMIC” and the “Class P REMIC”). Each Certificate, other than the Class R, Class R-X, Class R-II, Class P, and Class C Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. In addition, the Class 1A-1A, Class 1A-1B, Class 2A-1A, Class 2A-1B, Class 2A-1C, Class ▇-▇, ▇▇▇▇▇ ▇-▇, Class M-3, Class M-4, Class M-5 and Class M-6 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls. The Class C Certificates shall represent ownership of a regular interest in the Class C REMIC. The Class C Certificates, in addition to representing beneficial ownership of REMIC I". For purposes regular interests, also represent beneficial ownership of the REMIC Provisions, Component I Basis Risk Reserve Fund and the Yield Maintenance Account. The Class P Certificates shall represent ownership of a regular interest in the Class P REMIC. The Class R Certificate represents the ownership of the sole residual interest in the Upper-Tier REMIC. The Class R Certificates will represent R-II Certificate represents ownership of the sole class of "residual interests" interest in REMIC I. Component I the Lower-Tier REMIC. The Class R-X Certificate represents ownership of the sole residual interest in each of the Class C REMIC and the Class P REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreement, and the interests in any REMIC formed hereby. The Upper-Tier REMIC shall hold as assets the uncertificated Lower-Tier Interests in the Lower-Tier REMIC, other than the Class LT-R Certificates will not bear Interest, and each such Middle-Tier Interest is hereby designated as a regular interest or have a principal amountin the Lower-Tier REMIC. The Class C REMIC shall hold as assets the uncertificated Class C Interest in the Upper-Tier REMIC. The Class P REMIC shall hold as assets the uncertificated Class P Interest in the Upper-Tier REMIC. Lower-Tier REMIC Interests The following table irrevocably sets forth specifies the designation, the Uncertificated Pass-Through Rate (as defined herein) interest rate, initial principal balance, and the initial Uncertificated Principal Balance (as defined herein) Corresponding Class of Certificates for each of the Uncertificated REMIC I Regular Interests Lower-Tier Interest: LT1A-1A (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 127,363,000.00 Class 1A-1A LT1A-1B (other than the Underlying Group V Certificates1) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 31,840,500.00 Class 1A-1B LT2A-1A (1) $ 162,861,500.00 Class 2A-1A LT2A-1B (1) $ 67,859,000.00 Class 2A-1B LT2A-1C (1) $ 40,715,000.00 Class ▇▇-▇▇ ▇▇▇-▇ (1) $ 13,876,000.00 Class ▇-▇ ▇▇▇-▇ (1) $ 10,818,500.00 Class ▇-▇ ▇▇▇-▇ (1) $ 6,350,000.00 Class ▇-▇ ▇▇▇-▇ (1) $ 1,175,500.00 Class ▇-▇ ▇▇▇-▇ (1) $ 1,411,000.00 Class ▇-▇ ▇▇▇-▇ (1) $ 2,351,500.00 Class M-6 LTP (1) $ 50.00 Class P LTQ (1) $ 474,152,734.50 N/A LT-R (2) (2) Class R-II __________________________

PRELIMINARY STATEMENT. The Trustee Seller intends to sell the Mortgage Loans (as hereinafter identified) to the Purchaser on behalf of the terms and subject to the conditions set forth in this Agreement. The Purchaser intends to deposit the Mortgage Loans into a mortgage pool comprising the Trust Fund. The Trust Fund will execute and deliver the Bear Stearns Structured Products Inc. be evidenced by a single series of mortgage pass-through certificates designated as ACE Securities Corp. Home Equity Loan Trust, Series 20072006-R8ASAP4, Asset Backed Pass-Through Certificates (the “Certificates”). The Certificates will consist of twenty classes of certificates. The Certificates will be issued pursuant to a Pooling and Servicing Agreement for ACE Securities Corp. Home Equity Loan Trust, Series 2006-ASAP4, Asset Backed Pass-Through Certificates, dated as of July 1, 2006 (the “Pooling and Servicing Agreement”), among the Purchaser as depositor, ▇▇▇▇▇ Fargo Bank, National Association as master servicer (the “Master Servicer”) and securities administrator (the “Securities Administrator”), Ocwen Loan Servicing, LLC as servicer (the “Servicer”) and HSBC Bank USA, National Association as trustee (the “Trustee”). The Purchaser will sell the Class A-1 Certificates and, the Class A-2A, Class I-A-1A-2B, Class IA-2C and Class A-2D Certificates (collectively, the “Class A-2 Certificates”) and the Class ▇-A-2▇, Class II-A-1, Class II-A-2, Cl▇▇▇▇▇ ▇-▇▇-A-1, Class III-A-2M-3, Class IV-A-1M-4, Class IV-A-2M-5, Class V-A-1aM-6, Class V-A-1bM-7, Class V-A-1cM-8, Class V-A-2M-9, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 M-10 and Class R M-11 Certificates representing (collectively, the “Mezzanine Certificates”) to Deutsche Bank Securities Inc. (“DBSI”), pursuant to the Second Amended and Restated Underwriting Agreement, dated as of June 24, 1999, as amended and restated to and including January 25, 2006, between the Purchaser and DBSI, and the Terms Agreement, dated July 26, 2006 (collectively, the “Underwriting Agreement”), between the Purchaser and DBSI. Capitalized terms used but not defined herein shall have the meanings set forth in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein)Pooling and Servicing Agreement. The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, the Trustee will elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates (other than the Underlying Group V Certificates) parties hereto agree as a REMIC for federal income tax purposes, designated as "REMIC I". For purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amount. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.follows:

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2005-3 Mortgage Loan Pass-Through Certificates, Series 20072005-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 3 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of seventeen classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A1A Certificates, (iii) the Class 2-A1B Certificates, (iv) the Class 2-A1C Certificates, (v) the Class 2-A2 Certificates, (vi) the Class X-1 Certificates, (vii) the Class X-2 Certificates, (viii) the Class PO-1 Certificates, (ix) the Class PO-2 Certificates, (x) the Class A-R Certificates, (xi) the Class B-1 Certificates, (xii) the Class B-2 Certificates, (xiii) the Class B-3 Certificates, (xiv) the Class B-4 Certificates, (xv) the Class B-5 Certificates, (xvi) the Class B-6 Certificates and (xvii) the Class B-7 Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates (other than assets held in the Underlying Group V CertificatesBasis Risk Reserve Fund and the Yield Maintenance Account and the Yield Maintenance Agreements) as a REMIC be treated for federal income tax purposespurposes as comprising two real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R Certificate, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, (i) the Class 1-A, Class 2-A1A, Class 2-A1B, Class 2-A1C, Class 2-A2, Class B-1, Class B-2, Class B-3, Class B-4, Class B-5, Class B-6 and Class B-7 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC ProvisionsBasis Risk Reserve Fund as provided in Section 5.07 and (ii) the Class 2-A1A, Component I Class 2-A1B, Class 2-A1C, Class 2-A2 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 4.04. The owners of the Class X-1 and Class X-2 Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund other than the assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account, the Yield Maintenance Agreements, and the interests in the Lower-Tier REMIC formed hereby. The following table irrevocably sets forth Upper Tier REMIC shall hold as assets the designationuncertificated Lower-Tier REMIC Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as the "a REMIC regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interestsinterest.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. TrustMortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates SB1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates. REMIC I As provided herein, to be issued hereunder in multiple classes, which in the Trustee aggregate will elect to treat evidence the segregated pool of assets contained entire beneficial ownership interest in the Trust Fund consisting Fund. The Certificates will consist of twelve classes of certificates, designated as (i) the Underlying Class A-1A Certificates, (ii) the Class A-1B Certificates, (iii) the Class M-1 Certificates, (iv) the Class M-2 Certificates, (v) the Class M-3 Certificates, (vi) the Class M-4 Certificates, (vii) the Class M-5 Certificates, (viii) the Class M-6 Certificates, (ix) the Class M-7 Certificates, (x) the Class C Certificates, (xi) the Class P Certificates, (xii) the Class ES Certificates and (other than xiii) the Underlying Group V Class R Certificates) as a REMIC for . For federal income tax purposes, designated the Trust Fund (exclusive of the assets held in the Basis Risk Reserve Fund, the Class ES Distributable Amount, the Yield Maintenance Account, and the Final Maturity Reserve Account (the “Excluded Trust Property”)) comprises two REMICs in a tiered REMIC structure: the “Lower-Tier REMIC” and the “Upper-Tier REMIC.” Each Certificate, other than the Class R and Class ES Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "described herein. The LIBOR Certificates and the MTA Certificates also represent the right to receive (i) payments in respect of the Final Maturity Reserve Account, (ii) payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 and (iii) payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 5.01(f). The owners of the Class C Certificates beneficially own the Basis Risk Reserve Fund, the Final Maturity Reserve Account, the Final Maturity Reserve Trust, the Yield Maintenance Trust, the Yield Maintenance Trust Account and the Yield Maintenance Account. The Class R Certificate represents the sole class of residual interest in the Upper-Tier REMIC I"and the Lower-Tier REMIC. The Lower-Tier REMIC will hold as its assets all of the assets constituting the Trust Fund (exclusive of the Excluded Trust Property) and will issue interests (the “Lower-Tier Regular Interests”) (which will be uncertificated and will represent the regular interests in the Lower-Tier REMIC) and a residual interest (the “Class LT-R Interest”) which will also be uncertificated and which will represent the sole class of residual interest in the Lower-Tier REMIC. The Trustee will hold the Lower-Tier Regular Interests as assets of the Upper-Tier REMIC. For purposes of the REMIC Provisions, Component I of the Class R Certificates startup day for each REMIC created hereby is the Closing Date. All REMIC regular and residual interests created hereby will represent ownership of be retired on or before the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountLatest Possible Maturity Date. The following table irrevocably sets forth (or describes) the designation, interest rate, and initial principal balance of each Lower-Tier Regular Interest in the Uncertificated PassLower-Through Rate Tier REMIC: LT-A-1A (as defined herein1) and the initial Uncertificated Principal Balance $ 149,585,000.00 A-1A LT-A-1B (as defined herein1) for each of the Uncertificated REMIC $ 37,396,500.00 A-1B LT-M-2 (1) $ 2,827,000.00 M-2 LT-M-5 (1) $ 1,817,500.00 M-5 LT-M-6 (1) $ 1,110,500.00 M-6 LT-M-7 (1) $ 1,211,500.00 M-▇ ▇▇-▇ (1) $ 50.00 P LT-Q (1) $ 202,933,192.23 N/A LT-I Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 2) (other than the Underlying Group V Certificates2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.N/A LT-R (3) (3) N/A

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of nineteen classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class M-1 Certificates (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class M-10 Certificates, (xv) the Class M-11 Certificates, (xvi) the Class C Certificates, (xvii) the Class P Certificates, (xviii) the Class R Certificates and (xix) the Class R-X Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets (other than the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Swap Account, the Serivicer Prepayment Charge Payment Amounts, the Supplemental Interest Trust and the Interest Rate Swap Agreement) subject to this Agreement as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as "“REMIC I". For 1.” The Class R-1 Interest shall be the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein). The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) and, for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the Uncertificated REMIC I 1 Regular Interests (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "latest possible maturity date" for each . None of the REMIC 1 Regular Interests shall be certificated. Designation Uncertificated REMIC 1 Pass-Through Rate Initial Uncertificated Principal Balance Latest Possible Maturity Date(1) I Regular Interests.Variable(2) $ 15,563,686.46 April 25, 2036 I-1-B Variable(2) $ 10,360,721.25 April 25, 2036 I-3-B Variable(2) $ 15,524,856.25 April 25, 2036 I-4-B Variable(2) $ 18,062,836.25 April 25, 2036 I-7-B Variable(2) $ 25,195,016.25 April 25, 2036 I-8-B Variable(2) $ 27,288,702.50 April 25, 2036 I-9-B Variable(2) $ 28,688,516.25 April 25, 2036 I-11-B Variable(2) $ 26,673,445.00 April 25, 2036 I-14-B Variable(2) $ 23,101,442.50 April 25, 2036 I-15-B Variable(2) $ 22,022,096.25 April 25, 2036 I-16-A Variable(2) $ 20,993,996.25 April 25, 2036 I-16-B Variable(2) $ 20,993,996.25 April 25, 2036 I-18-B Variable(2) $ 19,090,637.50 April 25, 2036 I-19-B Variable(2) $ 18,520,933.75 April 25, 2036 I-21-B Variable(2) $ 44,804,808.75 April 25, 2036 I-25-B Variable(2) $ 14,073,347.50 April 25, 2036 I-26-B Variable(2) $ 9,585,573.75 April 25, 2036 I-27-A Variable(2) $ 9,064,120.00 April 25, 2036 I-27-B Variable(2) $ 9,064,120.00 April 25, 2036 I-28-B Variable(2) $ 8,572,308.75 April 25, 2036 I-29-B Variable(2) $ 8,108,280.00 April 25, 2036 I-30-B Variable(2) $ 7,671,021.25 April 25, 2036 I-32-B Variable(2) $ 6,869,532.50 April 25, 2036 I-33-B Variable(2) $ 6,502,482.50 April 25, 2036 I-38-B Variable(2) $ 4,954,121.25 April 25, 2036 I-39-A Variable(2) $ 4,694,793.75 April 25, 2036 I-39-B Variable(2) $ 4,694,793.75 April 25, 2036 I-40-B Variable(2) $ 4,449,905.00 April 25, 2036 I-41-B Variable(2) $ 4,218,630.00 April 25, 2036 I-42-B Variable(2) $ 4,000,225.00 April 25, 2036 I-43-B Variable(2) $ 81,529,505.00 April 25, 2036 ________________

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-2 Mortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates 2 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Fund, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all of the Certificates, to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. REMIC I The Certificates will consist of thirty-eight classes of certificates, designated as (i) the Class 1-A Certificates, (ii) the Class 2-A1A Certificates, (iii) the Class 2-A1B Certificates, (iv) the Class 3-A1A Certificates, (v) the Class 3-A1B Certificates, (vi) the Class 4-A Certificates, (vii) the Class X Certificates, (viii) the Class A-R Certificates, (ix) the Class B-1 Certificates, (x) the Class B-2 Certificates, (xi) the Class B-3 Certificates, (xii) the Class B-4 Certificates, (xiii) the Class B-5 Certificates, (xiv) the Class B-6 Certificates and (xv) the Class P Certificates. As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying assets held in the Basis Risk Reserve Fund, the Yield Maintenance Account and the Yield Maintenance Agreements, and amounts distributable on the Class P Certificates (other than collectively, the Underlying Group V Certificates“Excluded Trust Property”)) as a REMIC be treated for federal income tax purposespurposes as comprising three real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC” and the “Upper-Tier REMIC”). Each Certificate, other than the Class A-R and Class P Certificates, shall represent ownership of a regular interest in the Upper-Tier REMIC, as "REMIC I"described herein. For purposes In addition, (i) the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the REMIC ProvisionsBasis Risk Reserve Fund as provided in Section 5.07 and (ii) the Class B-1, Component I Class B-2 and Class B-3 Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Yield Maintenance Account as provided in Section 4.04. The owners of the Class X Certificates beneficially own the Basis Risk Reserve Fund and the Yield Maintenance Account. The Class A-R Certificates will represent ownership of Certificate represents the sole class of "residual interests" interest in each REMIC. The Lower-Tier REMIC I. Component I shall hold as assets all property of the Class R Certificates will not bear interest or have a principal amountTrust Fund, other than the Excluded Trust Property and the interests in the Lower-Tier REMIC and the Middle-Tier REMIC formed hereby. The following table irrevocably sets forth Middle-Tier REMIC shall hold as assets the designationuncertificated Lower-Tier Interests, other than the Uncertificated PassClass LT-Through Rate (as defined herein) and the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein), which are R Interest. Each such Lower-Tier Interest is hereby designated as a REMIC regular interest. The Upper-Tier REMIC shall hold as assets the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii)uncertificated Middle-Tier Interests, the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as the "latest possible maturity date" for each of the Uncertificated a REMIC I Regular Interestsregular interest.

PRELIMINARY STATEMENT. The Trustee on behalf Through this Agreement, the Depositor intends to cause the issuance and sale of the HarborView Mortgage Loan Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust2006-CB1 Mortgage Loan Pass-Through Certificates, Series 20072006-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates CB1 (the “Certificates”) representing in the aggregate the entire beneficial ownership of the Trust (as defined herein)Trust, the primary assets of which are the Underlying Certificates Mortgage Loans (as defined hereinbelow). The Depositor intends to sell some or all the Certificates to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of sixteen classes of certificates, designated as (i) the Class 1-A1A Certificates, (ii) the Class 1-A1B Certificates, (iii) the Class 1-A1C, (iv) the Class 2-A1A Certificates, (v) the Class 2-A1B Certificates, (vi) the Class 2-A1C Certificates, (vii) the Class 2-X Certificates, (viii) the Class 2-PO Certificates, (ix) the Class 2-A-R Certificates, (x) the Class 2-B1 Certificates, (xi) the Class 2-B2 Certificates, (xii) the Class 2-B3 Certificates, (xiii) the Class 2-B4 Certificates, (xiv) the Class 2-B5 Certificates, and (xvi) the Class 2-B6 Certificates. REMIC I As provided herein, the Trustee will shall elect to treat the segregated pool of assets contained in that the Trust Fund consisting (exclusive of the Underlying Certificates assets held in the Basis Risk Reserve Fund (other than the Underlying Group V Certificates“Excluded Trust Property”)) as a REMIC be treated for federal income tax purposespurposes as comprising four real estate mortgage investment conduits (each, designated a “REMIC” or, in the alternative, the “Lower-Tier REMIC,” the “Middle-Tier REMIC,” the “Group 2 REMIC,” and the “Group 1 REMIC”). Each Certificate having a “1” in its class designation shall represent ownership of a regular interest in the Group 1 REMIC, as "REMIC I"described herein. For purposes Each Certificate having a “2” in its class designation, other than the Class 2-A-R Certificates, shall represent ownership of a regular interest in the REMIC ProvisionsGroup 2 REMIC, Component I as described herein. In addition, the LIBOR Certificates represent the right to receive payments in respect of Basis Risk Shortfalls from the Basis Risk Reserve Fund as provided in Section 5.07 of this Agreement. The owners of the Class 2-X Certificates beneficially own the Basis Risk Reserve Fund. The Class 2-A-R Certificates will represent Certificate represents ownership of the sole class of "residual interests" interest in REMIC I. Component I each of the Lower-Tier REMIC, the Middle-Tier REMIC, the Group 2 REMIC, and the Group 1 REMIC. The Lower-Tier REMIC shall hold as assets all property of the Trust Fund related to Loan Group 2, other than the Excluded Trust Property and the Lower-Tier REMIC Interests and the Middle-Tier REMIC Interests. The Middle-Tier REMIC shall hold as assets the uncertificated Lower-Tier Interests, other than the Class LT-R Certificates will not bear interest or have Interest. Each such Lower-Tier Interest is hereby designated as a principal amountREMIC regular interest. The Group 2 REMIC shall hold as assets the uncertificated Middle-Tier Interests, other than the Class MT-R Interest. Each such Middle-Tier Interest is hereby designated as a REMIC regular interest. The Group 1 REMIC shall hold as assets all of the property of the Trust Fund related to Loan Group 1. The following table irrevocably sets forth specifies the Class designation, the Uncertificated Passinterest rate, and initial principal amount for each Lower-Through Tier REMIC Interest: Designation Interest Rate (as defined herein) and the initial Uncertificated Initial Principal Balance Related Subgroup LT-SUB-2A (as defined herein1) for each of the Uncertificated REMIC I Regular Interests $ 64,846,055.77 Subgroup 2A LT-SC-2A (as defined herein), which are hereby designated as the "regular interests" in REMIC I. Solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates 1) $ 63,282.38 Subgroup 2A LT-SUB-2B (other than the Underlying Group V Certificates2) has been designated as the "latest possible maturity date" for each of the Uncertificated REMIC I Regular Interests.$ 59,806,254.47 Subgroup 2B LT-SC-2B (2) $ 58,366.21 Subgroup 2B LT-SUB-2C (3) $ 238,156,270.72 Subgroup ▇▇ ▇▇-▇▇-▇▇ (3) $ 232,437.08 Subgroup 2C LT-R (4) (4) N/A

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A1 Certificates, (ii) the Class I-A2 Certificates, (iii) the Class II-A1 Certificates, (iv) the Class II-A2 Certificates, (v) the Class II-A3 Certificates, (vi) the Class M-1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M-4 Certificates, (x) the Class M-5 Certificates, (xi) the Class M-6 Certificates, (xii) the Class M-7 Certificates, (xiii) the Class M-8 Certificates, (xiv) the Class M-9 Certificates, (xv) the Class B-1 Certificates, (xvi) the Class B-2 Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R-CX Certificates and (xxi) the Class R-PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Account and the Master Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass-Through Rate Assumed Final Maturity Date1 LT1-AA $[___________.__] Variable2 [_____, 20__] LT1-IA1 $[___________.__] Variable2 [_____, 20__] LT1-IA2 $[___________.__] Variable2 [_____, 20__] LT1-IIA1 $[___________.__] Variable2 [_____, 20__] LT1-IIA2 $[___________.__] Variable2 [_____, 20__] LT1-IIA3 $[___________.__] Variable2 [_____, 20__] LT1-M1 $[___________.__] Variable2 [_____, 20__] LT1-M2 $[___________.__] Variable2 [_____, 20__] LT1-M3 $[___________.__] Variable2 [_____, 20__] LT1-M4 $[___________.__] Variable2 [_____, 20__] LT1-M5 $[___________.__] Variable2 [_____, 20__] LT1-M6 $[___________.__] Variable2 [_____, 20__] LT1-M7 $[___________.__] Variable2 [_____, 20__] LT1-M8 $[___________.__] Variable2 [_____, 20__] LT1-M9 $[___________.__] Variable2 [_____, 20__] LT1-B1 $[___________.__] Variable2 [_____, 20__] LT1-B2 $[___________.__] Variable2 [_____, 20__] LT1-ZZ $[___________.__] Variable2 [_____, 20__] LT1-1SUB $[___________.__] Variable2 [_____, 20__] LT1-1GRP $[___________.__] Variable2 [_____, 20__] LT1-2SUB $[___________.__] Variable2 [_____, 20__] LT1-2GRP $[___________.__] Variable2 [_____, 20__] LT1-XX $[___________.__] Variable2 [_____, 20__] LT1-P $[___________.__] Variable2 [_____, 20__] 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled month of the maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass-Through Rate” herein. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 2.” The Class R-2 Interest represents the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 2 and each class of uncertificated “regular interests” in REMIC 2: Class Designation Original Class Certificate Principal Balance Pass-Through Rate Assumed Final Maturity Date1 I-A1 $[___________.__] Variable2 [_____, 20__] I-A2 $[___________.__] Variable2 [_____, 20__] II-A1 $[___________.__] Variable2 [_____, 20__] II-A2 $[___________.__] Variable2 [_____, 20__] II-A3 $[___________.__] Variable2 [_____, 20__] M-1 $[___________.__] Variable2 [_____, 20__] M-2 $[___________.__] Variable2 [_____, 20__] M-3 $[___________.__] Variable2 [_____, 20__] M-4 $[___________.__] Variable2 [_____, 20__] M-5 $[___________.__] Variable2 [_____, 20__] M-6 $[___________.__] Variable2 [_____, 20__] M-7 $[___________.__] Variable2 [_____, 20__] M-8 $[___________.__] Variable2 [_____, 20__] M-9 $[___________.__] Variable2 [_____, 20__] Swap IO N/A5 Variable5 [_____, 20__] Class C Interest3 $[___________.__] Variable2 [_____, 20__] Class P Interest $[___________.__] N/A4 [_____, 20__] ___________________ 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each Class of Certificates or uncertificated interests that represents one or more of the “regular interests” in REMIC 2. 2 Calculated in accordance with the definition of “Pass-Through Rate” herein. 3 The Class C Interest will accrue interest at its variable Pass-Through Rate on its Notional Amount outstanding from time to time, which shall equal the aggregate of the Uncertificated Principal Balances of the REMIC I 1 Regular Interests. The Class C Interest will not accrue interest on its Uncertificated Principal Balance. 4 The Class P Interest will not accrue interest. 5 The interests designated “Swap IO” will not have principal amounts or interest rates but will be entitled to 100% of the interest paid on REMIC 1 Regular Interests [__________]. These interests will not be certificated.

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass-through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust Fund created hereunder. The Certificates will consist of twenty one classes of certificates, designated as (i) the Class A-1 Certificates, (ii) the Class A-2 Certificates, (iii) the Class A-3 Certificates, (iv) the Class A-4 Certificates, (v) the Class M-1 Certificates, (vi) the Class M-2 Certificates, (vii) the Class M-3 Certificates, (viii) the Class M-4 Certificates, (ix) the Class M-5 Certificates, (x) the Class M-6 Certificates, (xi) the Class M-7 Certificates, (xii) the Class M-8 Certificates, (xiii) the Class M-9 Certificates, (xiv) the Class M-10 Certificates, (xv) the Class M-11 Certificates, (xvi) the Class C Certificates, (xvii) the Class P Certificates, (xviii) the Class R Certificates and (xix) the Class R-X Certificates. REMIC I As provided herein, the Trustee will elect make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Group I Mortgage Loans, the Group II Mortgage Loans and certain other related assets subject to this Agreement (other than but exclusive of the Underlying Group V CertificatesNet WAC Rate Carryover Reserve Account, the Master Servicer Prepayment Charge Payment Amounts, the Swap Account and the Interest Rate Swap Agreement) as a REMIC real estate investment conduit (a “REMIC”) for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R-1 Interest will represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 1 Pass-Through Rate (as defined herein) and Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and for purposes of satisfying Treasury regulation section Section 1.860G-1(a)(4)(iii), the Distribution Date immediately following the latest scheduled maturity date for the Underlying Certificates (other than the Underlying Group V Certificates) has been designated as the "“latest possible maturity date" ” for each of the Uncertificated REMIC I 1 Regular Interests.. None of the REMIC 1 Regular Interests will be certificated. I Variable $ 7,008,612.79 December 2035 I-1-A Variable $ 6,783,921.25 December 2035 I-1-B Variable $ 6,783,921.25 December 2035 I-2-B Variable $ 8,439,505.00 December 2035 I-3-B Variable $ 10,085,513.75 December 2035 I-4-B Variable $ 11,706,357.50 December 2035 I-5-A Variable $ 13,286,573.75 December 2035 I-5-B Variable $ 13,286,573.75 December 2035 I-6-B Variable $ 14,809,545.00 December 2035 I-7-B Variable $ 16,258,708.75 December 2035 I-9-B Variable $ 18,869,936.25 December 2035 I-10-B Variable $ 17,999,492.50 December 2035 I-11-A Variable $ 17,168,123.75 December 2035 I-11-B Variable $ 17,168,123.75 December 2035 I-12-B Variable $ 16,375,928.75 December 2035 I-13-A Variable $ 15,621,038.75 December 2035 I-13-B Variable $ 15,621,038.75 December 2035 I-14-B Variable $ 14,901,675.00 December 2035 I-15-A Variable $ 14,216,140.00 December 2035 I-15-B Variable $ 14,216,140.00 December 2035 I-16-B Variable $ 13,562,751.25 December 2035 I-17-B Variable $ 12,940,120.00 December 2035 I-18-A Variable $ 12,346,711.25 December 2035 I-18-B Variable $ 12,346,711.25 December 2035 I-19-A Variable $ 11,781,126.25 December 2035 I-19-B Variable $ 11,781,126.25 December 2035 I-20-A Variable $ 11,242,047.50 December 2035 I-20-B Variable $ 11,242,047.50 December 2035 I-21-A Variable $ 33,326,982.50 December 2035 I-21-B Variable $ 33,326,982.50 December 2035 I-22-B Variable $ 27,771,971.25 December 2035 I-23-A Variable $ 23,182,825.00 December 2035 I-23-B Variable $ 23,182,825.00 December 2035 I-24-B Variable $ 19,388,170.00 December 2035 I-25-B Variable $ 6,735,630.00 December 2035 I-26-A Variable $ 6,367,751.25 December 2035 I-26-B Variable $ 6,367,751.25 December 2035 I-27-A Variable $ 6,032,657.50 December 2035 I-27-B Variable $ 6,032,657.50 December 2035 I-28-A Variable $ 5,716,256.25 December 2035 I-28-B Variable $ 5,716,256.25 December 2035 I-29-A Variable $ 5,417,572.50 December 2035 I-29-B Variable $ 5,417,572.50 December 2035 I-30-A Variable $ 5,135,523.75 December 2035 I-30-B Variable $ 5,135,523.75 December 2035 I-31-B Variable $ 4,869,146.25 December 2035 I-32-A Variable $ 4,617,538.75 December 2035 I-32-B Variable $ 4,617,538.75 December 2035 I-33-A Variable $ 4,379,843.75 December 2035 I-33-B Variable $ 4,379,843.75 December 2035 I-34-A Variable $ 4,154,852.50 December 2035 I-34-B Variable $ 4,154,852.50 December 2035 I-35-A Variable $ 3,942,678.75 December 2035 I-35-B Variable $ 3,942,678.75 December 2035 I-37-B Variable $ 3,552,596.25 December 2035 I-38-A Variable $ 3,373,392.50 December 2035 I-38-B Variable $ 3,373,392.50 December 2035 I-39-A Variable $ 3,203,941.25 December 2035 I-39-B Variable $ 3,203,941.25 December 2035 I-40-A Variable $ 3,043,691.25 December 2035 I-40-B Variable $ 3,043,691.25 December 2035 I-41-A Variable $ 2,892,116.25 December 2035 I-41-B Variable $ 2,892,116.25 December 2035 I-42-A Variable $ 2,748,720.00 December 2035 I-42-B Variable $ 2,748,720.00 December 2035 I-43-A Variable $ 2,613,041.25 December 2035 I-43-B Variable $ 2,613,041.25 December 2035 I-44-A Variable $ 2,484,641.25 December 2035 I-44-B Variable $ 2,484,641.25 December 2035 I-45-A Variable $ 54,151,598.75 December 2035 I-45-B Variable $ 54,151,598.75 December 2035 P Variable $ 100.00 December 2035 ___________________

PRELIMINARY STATEMENT. The Trustee on behalf of the Trust will execute and deliver the Bear Stearns Structured Products Inc. Trust, Series 2007-R8, Class I-A-1, Class I-A-2, Class II-A-1, Class II-A-2, Cl▇▇▇ ▇▇▇-A-1, Class III-A-2, Class IV-A-1, Class IV-A-2, Class V-A-1a, Class V-A-1b, Class V-A-1c, Class V-A-2, Class V-A-3, Class VI-A-1a, Class VI-A-1b, Class VI-A-1c, Class VI-A-2 and Class R Certificates representing in the aggregate the entire beneficial ownership the Trust (as defined herein), the primary assets of which are the Underlying Certificates (as defined herein). The Depositor intends to sell some or all pass‑through certificates (collectively, the “Certificates”), to be issued hereunder in multiple classes, which in the aggregate will evidence the entire beneficial ownership interest in the Trust. The Certificates will consist of twenty-one classes of certificates, designated as (i) the Class I-A Certificates, (ii) the Class II-A1 Certificates, (iii) the Class II-A2 Certificates, (iv) the Class II-A3 Certificates, (v) the Class II‑A4 Certificates, (vi) the Class M‑1 Certificates, (vii) the Class M-2 Certificates, (viii) the Class M-3 Certificates, (ix) the Class M‑4 Certificates, (x) the Class M‑5 Certificates, (xi) the Class M‑6 Certificates, (xii) the Class M‑7 Certificates, (xiii) the Class M‑8 Certificates, (xiv) the Class M‑9 Certificates, (xv) the Class M-10 Certificates, (xvi) the Class B Certificates, (xvii) the Class C Certificates, (xviii) the Class P Certificates, (xix) the Class R Certificates, (xx) the Class R‑CX Certificates and (xxi) the Class R‑PX Certificates. REMIC I As provided herein, the Trustee will elect shall make an election to treat the segregated pool of assets contained in the Trust Fund consisting of the Underlying Certificates Mortgage Loans and certain other related assets subject to this Agreement (other than exclusive of the Underlying Group V CertificatesReserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as "“REMIC I". For 1.” The Class R‑1 Interest shall represent the sole class of “residual interests” in REMIC 1 for purposes of the REMIC Provisions, Component I of the Class R Certificates will represent ownership of the sole class of "residual interests" in REMIC I. Component I of the Class R Certificates will not bear interest or have a principal amountProvisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated Pass-Through Rate (as defined herein) and REMIC 1 Pass‑Through Rate, the initial Uncertificated Principal Balance (as defined herein) for each of the Uncertificated REMIC I Regular Interests (as defined herein)Balance, which are hereby designated as the "regular interests" in REMIC I. Solely and solely for purposes of satisfying Treasury regulation section 1.860G-1(a)(4)(iiiSection 1.860G‑1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 1 Regular Interests. None of the REMIC 1 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC 1 Pass‑Through Rate Rate Change Date Assumed Final Maturity Date1 IX3 $ 91,012,721.51 Variable2 N/A November 2046 I-5-B 724,073.82 Variable2 November 2046 I-12-B 5,720,371.90 Variable2 November 2046 I-14-B 5,616,680.52 Variable2 November 2046 I-15-B 5,455,296.25 Variable2 November 2046 I-18-A 4,674,500.26 Variable2 May 2008 November 2046 I-18-B 4,674,500.26 Variable2 November 2046 I-20-B 5,528,213.69 Variable2 November 2046 I-21-B 5,240,769.64 Variable2 November 2046 I-22-B 47,271,953.89 Variable2 November 2046 I-23-B 6,443,588.38 Variable2 November 2046 I-24-B 6,661,376.34 Variable2 November 2046 I-25-B 5,736,844.07 Variable2 November 2046 I-26-B 4,434,964.01 Variable2 November 2046 I-27-B 3,663,717.77 Variable2 November 2046 I-28-B 3,161,185.92 Variable2 November 2046 I-29-A 2,747,466.50 Variable2 April 2009 November 2046 I-29-B 2,747,466.50 Variable2 November 2046 I-30-B 2,333,351.15 Variable2 November 2046 I-33-B 1,996,035.21 Variable2 November 2046 I-34-B 2,640,303.00 Variable2 November 2046 I-35-A 371,178.94 Variable2 October 2009 November 2046 I-35-B 371,178.94 Variable2 November 2046 I-38-B 1,942,136.87 Variable2 November 2046 I-40-B 1,764,913.09 Variable2 November 2046 I-41-A 1,676,399.20 Variable2 April 2010 November 2046 I-42-A 1,548,675.58 Variable2 May 2010 November 2046 I-42-B 1,548,675.58 Variable2 November 2046 I-44-A 1,248,031.02 Variable2 July 2010 November 2046 I-44-B 1,248,031.02 Variable2 November 2046 I-45-A 1,195,354.70 Variable2 August 2010 November 2046 I-45-B 1,195,354.70 Variable2 November 2046 I-47-B 1,362,344.89 Variable2 November 2046 I-48-B 1,312,950.54 Variable2 November 2046 I-49-B 1,245,215.60 Variable2 November 2046 I-50-B 1,193,674.38 Variable2 November 2046 I-51-A 1,103,113.95 Variable2 February 2011 November 2046 I-51-B 1,103,113.95 Variable2 November 2046 I-52-A 1,020,761.85 Variable2 March 2011 November 2046 I-52-B 1,020,761.85 Variable2 November 2046 I-53-A 966,559.99 Variable2 April 2011 November 2046 I-53-B 966,559.99 Variable2 November 2046 I-54-B 994,234.22 Variable2 November 2046 I-55-B 1,033,070.16 Variable2 November 2046 I-56-A 935,359.69 Variable2 July 2011 November 2046 I-56-B 935,359.69 Variable2 November 2046 I-57-A 858,790.80 Variable2 August 2011 November 2046 I-57-B 858,790.80 Variable2 November 2046 I-58-A 767,515.77 Variable2 September 2011 November 2046 I-58-B 767,515.77 Variable2 November 2046 I-59-B 11,056,071.12 Variable2 November 2046 IIX3 173,903,265.59 Variable2 N/A November 2046 II-1-B 3,452,994.13 Variable2 November 2046 II-2-B 4,074,496.02 Variable2 November 2046 II-3-B 4,692,764.58 Variable2 November 2046 II-4-B 5,302,799.66 Variable2 November 2046 II-6-B 2,121,653.29 Variable2 November 2046 II-8-B 3,952,346.36 Variable2 November 2046 II-9-B 5,001,236.51 Variable2 November 2046 II-10-B 6,388,425.55 Variable2 November 2046 II-11-A 10,286,135.84 Variable2 October 2007 November 2046 II-11-B 10,286,135.84 Variable2 November 2046 II-12-A 10,930,245.10 Variable2 November 2007 November 2046 II-12-B 10,930,245.10 Variable2 November 2046 II-13-A 11,030,022.73 Variable2 December 2007 November 2046 II-13-B 11,030,022.73 Variable2 November 2046 II-14-B 10,732,115.98 Variable2 November 2046 II-15-B 10,423,749.75 Variable2 November 2046 II-16-B 10,141,474.32 Variable2 November 2046 II-18-A 8,931,837.74 Variable2 May 2008 November 2046 II-18-B 8,931,837.74 Variable2 November 2046 II-19-A 11,216,814.02 Variable2 June 2008 November 2046 II-19-B 11,216,814.02 Variable2 November 2046 II-20-A 10,563,077.31 Variable2 July 2008 November 2046 II-20-B 10,563,077.31 Variable2 November 2046 II-21-B 10,013,841.36 Variable2 November 2046 II-22-B 90,325,253.61 Variable2 November 2046 II-23-B 12,312,136.62 Variable2 November 2046 II-24-B 12,728,276.66 Variable2 November 2046 II-25-B 10,961,719.43 Variable2 November 2046 II-26-A 8,474,141.99 Variable2 January 2009 November 2046 II-26-B 8,474,141.99 Variable2 November 2046 II-27-A 7,000,477.23 Variable2 February 2009 November 2046 II-27-B 7,000,477.23 Variable2 November 2046 II-28-B 6,040,260.58 Variable2 November 2046 II-29-A 5,249,743.00 Variable2 April 2009 November 2046 II-29-B 5,249,743.00 Variable2 November 2046 II-30-A 4,458,468.85 Variable2 May 2009 November 2046 II-30-B 4,458,468.85 Variable2 November 2046 II-31-B 4,178,349.85 Variable2 November 2046 II-32-A 4,013,977.53 Variable2 July 2009 November 2046 II-32-B 4,013,977.53 Variable2 November 2046 II-33-A 3,813,939.79 Variable2 August 2009 November 2046 II-33-B 3,813,939.79 Variable2 November 2046 II-34-A 5,044,979.50 Variable2 September 2009 November 2046 II-34-B 5,044,979.50 Variable2 November 2046 II-35-A 709,233.06 Variable2 October 2009 November 2046 II-35-B 709,233.06 Variable2 November 2046 II-36-B 7,423,525.06 Variable2 November 2046 II-37-B 3,939,801.99 Variable2 November 2046 II-38-A 3,710,953.13 Variable2 January 2010 November 2046 II-38-B 3,710,953.13 Variable2 November 2046 II-39-A 3,533,025.51 Variable2 February 2010 November 2046 II-39-B 3,533,025.51 Variable2 November 2046 II-40-A 3,372,321.41 Variable2 March 2010 November 2046 II-40-B 3,372,321.41 Variable2 November 2046 II-41-A 3,203,192.80 Variable2 April 2010 November 2046 II-41-B 3,203,192.80 Variable2 November 2046 II-42-A 2,959,143.92 Variable2 May 2010 November 2046 II-42-B 2,959,143.92 Variable2 November 2046 II-43-A 2,802,342.40 Variable2 June 2010 November 2046 II-43-B 2,802,342.40 Variable2 November 2046 II-44-A 2,384,684.98 Variable2 July 2010 November 2046 II-44-B 2,384,684.98 Variable2 November 2046 II-45-A 2,284,033.30 Variable2 August 2010 November 2046 II-45-B 2,284,033.30 Variable2 November 2046 II-47-A 2,603,111.11 Variable2 October 2010 November 2046 II-47-B 2,603,111.11 Variable2 November 2046 II-48-A 2,508,730.46 Variable2 November 2010 November 2046 II-48-B 2,508,730.46 Variable2 November 2046 II-49-A 2,379,305.40 Variable2 December 2010 November 2046 II-49-B 2,379,305.40 Variable2 November 2046 II-50-A 2,280,822.62 Variable2 January 2011 November 2046 II-50-B 2,280,822.62 Variable2 November 2046 II-51-A 2,107,783.55 Variable2 February 2011 November 2046 II-51-B 2,107,783.55 Variable2 November 2046 II-52-A 1,950,428.65 Variable2 March 2011 November 2046 II-52-B 1,950,428.65 Variable2 November 2046 II-55-A 1,973,946.84 Variable2 June 2011 November 2046 II-55-B 1,973,946.84 Variable2 November 2046 II-56-A 1,787,245.81 Variable2 July 2011 November 2046 II-56-B 1,787,245.81 Variable2 November 2046 II-57-A 1,640,941.20 Variable2 August 2011 November 2046 II-57-B 1,640,941.20 Variable2 November 2046 II-58-A 1,466,536.73 Variable2 September 2011 November 2046 II-58-B 1,466,536.73 Variable2 November 2046 II-59-A 21,125,473.88 Variable2 October 2011 November 2046 II-59-B 21,125,473.88 Variable2 November 2046 1 Solely for purposes of Section 1.860G‑1(a)(4)(iii) of the Treasury regulations, the Distribution Date immediately in the month following the latest scheduled maturity date for the Underlying Certificates (other than Mortgage Loan with the Underlying Group V Certificates) latest maturity date has been designated as the "“latest possible maturity date" ” for each REMIC 1 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 1 Pass‑Through Rate” herein. 3 REMIC 1 Regular Interest IX will be entitled to all prepayment penalties or charges with respect to the Group I Mortgage Loans; REMIC 1 Regular Interest IIX will be entitled to all prepayment penalties or charges with respect to the Group II Mortgage Loans. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 1 Regular Interests and certain other related assets subject to this Agreement (exclusive of the Reserve Fund, the Supplemental Interest Trust, the Final Maturity Reserve Trust, the Interest Coverage Account and the Servicer Prepayment Charge Payment Amounts) as a REMIC for federal income tax purposes, and such segregated pool of assets will be designated as “REMIC 2.” The Class R‑2 Interest shall represent the sole class of “residual interests” in REMIC 2 for purposes of the REMIC Provisions (as defined herein) under federal income tax law. The following table irrevocably sets forth the designation, the Uncertificated REMIC 2 Pass-Through Rate, the initial Uncertificated Principal Balance, and solely for purposes of satisfying Treasury regulation Section 1.860G-1(a)(4)(iii), the “latest possible maturity date” for each of the REMIC 2 Regular Interests. None of the REMIC 2 Regular Interests will be certificated. Designation Initial Uncertificated Principal Balance Uncertificated REMIC I 2 Pass-Through Rate Assumed Final Maturity Date1 AA $744,842,230.21 Variable2 November 2046 A-IA 2,101,980.00 Variable2 November 2046 A-IIA1 1,647,385.00 Variable2 November 2046 A-IIA2 714,610.00 Variable2 November 2046 A-IIA3 1,220,790.00 Variable2 November 2046 A-IIA4 433,605.00 Variable2 November 2046 M1 243,215.00 Variable2 November 2046 M2 228,015.00 Variable2 November 2046 M3 140,610.00 Variable2 November 2046 M4 125,410.00 Variable2 November 2046 M5 125,410.00 Variable2 November 2046 M6 110,205.00 Variable2 November 2046 M7 79,805.00 Variable2 November 2046 M8 79,805.00 Variable2 November 2046 M9 53,205.00 Variable2 November 2046 M10 53,205.00 Variable2 November 2046 B 76,005.00 Variable2 November 2046 ZZ 7,767,601.84 Variable2 November 2046 1GRP 52,223.04 Variable2 November 2046 1SUB 10,183.44 Variable2 November 2046 2GRP 99,785.58 Variable2 November 2046 2SUB 19,457.78 Variable2 November 2046 Swap IO N/A3 Variable2 November 2046 FMR IO N/A4 Variable2 November 2046 XX 759,861,442.21 Variable2 November 2046 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each REMIC 2 Regular Interest. 2 Calculated in accordance with the definition of “Uncertificated REMIC 2 Pass-Through Rate” herein. 3 REMIC 2 Regular Interest Swap IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of the REMIC 1 Regular Interests with the designation “A”. 4 REMIC 2 Regular Interest FMR IO will not have a principal amount but will at all times have a notional amount equal to the aggregate principal amounts of all of the REMIC 1 Regular Interests. As provided herein, the Trustee shall make an election to treat the segregated pool of assets consisting of the REMIC 2 Regular Interests as a REMIC for federal income tax purposes, and such segregated pool of assets shall be designated as “REMIC 3.” The Class R‑3 Interest represents the sole class of “residual interests” in REMIC 3 for purposes of the REMIC Provisions. The following table sets forth (or describes) the Class designation, Pass-Through Rate and Original Class Certificate Principal Balance for each Class of Certificates that represents one or more of the “regular interests” in REMIC 3 and each class of uncertificated “regular interests” in REMIC 3: I‑A $420,396,000.00 Variable2 November 2046 II-A1 329,477,000.00 Variable2 November 2046 II-A2 142,922,000.00 Variable2 November 2046 II-A3 244,158,000.00 Variable2 November 2046 II-A4 86,721,000.00 Variable2 November 2046 M‑1 48,643,000.00 Variable2 November 2046 M‑2 45,603,000.00 Variable2 November 2046 M‑3 28,122,000.00 Variable2 November 2046 M‑4 25,082,000.00 Variable2 November 2046 M‑5 25,082,000.00 Variable2 November 2046 M‑6 22,041,000.00 Variable2 November 2046 M‑7 15,961,000.00 Variable2 November 2046 M‑8 15,961,000.00 Variable2 November 2046 M‑9 10,641,000.00 Variable2 November 2046 M-10 10,641,000.00 Variable2 November 2046 B 15,201,000.00 Variable2 November 2046 Swap IO N/A Variable5 November 2046 FM Reserve IO N/A Variable5 November 2046 Class C Interest3 33,434,084.10 Variable2 November 2046 Class P Interest $100.00 N/A4 November 2046 ___________________ 1 Solely for purposes of Section 1.860G-1(a)(4)(iii) of the Treasury regulations, the Distribution Date in the month following the month of the maturity date for the Mortgage Loan with the latest maturity date has been designated as the “latest possible maturity date” for each Class of Certificates or uncertificated interests that represents one or more of the “regular interests” in REMIC 3. 2 Calculated in accordance with the definition of “Pass-Through Rate” herein. 3 The Class C Interest will accrue interest at its variable Pass-Through Rate on its Notional Amount outstanding from time to time, which shall equal the aggregate of the Uncertificated Principal Balances of the REMIC 2 Regular Interests. The Class C Interest will not accrue interest on its Uncertificated Principal Balance. 4 The Class P Interest will not accrue interest. 5 The interests designated “Swap IO” and “FM Reserve IO” will not have principal amounts or interest rates but will be entitled to 100% of the interest paid on REMIC 2 Regular Interests Swap IO and FMR IO, respectively. These interests will not be certificated.