EXHIBIT 1.1 FORM OF UNDERWRITING AGREEMENT IDENIX PHARMACEUTICALS, INC. COMMON STOCK (PAR VALUE $0.001 PER SHARE) UNDERWRITING AGREEMENTUnderwriting Agreement • July 6th, 2004 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • New York
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CONFIDENTIAL Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. STOCK PURCHASE AGREEMENTStock Purchase Agreement • July 6th, 2004 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • New York
Contract Type FiledJuly 6th, 2004 Company Industry Jurisdiction
BETWEENLicense Agreement • July 6th, 2004 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • Massachusetts
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AGREEMENTAgreement • July 6th, 2004 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • New York
Contract Type FiledJuly 6th, 2004 Company Industry Jurisdiction
BY AND AMONGLicense and Commercialization Agreement • July 6th, 2004 • Idenix Pharmaceuticals Inc • Pharmaceutical preparations • New York
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BETWEENIdenix Pharmaceuticals Inc • July 6th, 2004 • Pharmaceutical preparations
Company FiledJuly 6th, 2004 Industry
Dipartimento di Biologia Sperimentale "Bernardo Loddo" dell'Universita di Cagliari CittadellaUniversitaria SS 554 KM 4.5 09133 Monserrato (Cagliari) Dear Sir: Co-operative Antiviral Research Activity Agreement With reference to the Co-operative...Idenix Pharmaceuticals Inc • July 6th, 2004 • Pharmaceutical preparations
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AGREEMENTIdenix Pharmaceuticals Inc • July 6th, 2004 • Pharmaceutical preparations
Company FiledJuly 6th, 2004 Industry