Infinity Pharmaceuticals, Inc. Announces Corporate Development Conference Call

CAMBRIDGE, Mass., April 12 /PRNewswire/ -- Infinity Pharmaceuticals, Inc. announces that it will hold a conference call to discuss recent corporate developments at 11:00 a.m. EDT (8:00 a.m. PDT) on Wednesday, April 12, 2006. The webcast will be publicly available via the Internet accessible on Infinity’s website at http://www.ipi.com. A replay of the webcast will be available on the website for 30 days.

About Infinity Pharmaceuticals, Inc.

Infinity is an innovative cancer drug discovery and development company that leverages its strength in small molecule technologies to bring important new medicines to patients.

Contacts: Adelene Q. Perkins Executive Vice President, Chief Business Officer Infinity Pharmaceuticals, Inc. 617-453-1104 Adelene.Perkins@ipi.com Monique Allaire Corporate Communications Infinity Pharmaceuticals, Inc. 617-453-1105 Monique.Allaire@ipi.com

Infinity Pharmaceuticals, Inc.

CONTACT: Adelene Q. Perkins, Executive Vice President, Chief BusinessOfficer, +1-617-453-1104, Adelene.Perkins@ipi.com, or Monique Allaire,Corporate Communications, +1-617-453-1105, Monique.Allaire@ipi.com, both ofInfinity Pharmaceuticals, Inc.

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