Exhibit 4.1 FORM OF WARRANT THIS WARRANT IS SUBJECT TO THE RESTRICTIONS ON TRANSFER SET FORTH IN SECTION 5 OF THIS WARRANTHybridon Inc • April 15th, 2004 • Biological products, (no disgnostic substances) • Delaware
Company FiledApril 15th, 2004 Industry Jurisdiction
Exhibit 1.1 HYBRIDON, INC. PLACEMENT AGENCY AGREEMENT April 15, 2004 PLACEMENT AGENCY AGREEMENTAgency Agreement • April 15th, 2004 • Hybridon Inc • Biological products, (no disgnostic substances) • New York
Contract Type FiledApril 15th, 2004 Company Industry Jurisdiction