CAMBRIDGE, Mass.--(BUSINESS WIRE)--Jun 7, 2007 - Sirtris Pharmaceuticals (NASDAQ: SIRT), a biopharmaceutical company focused on discovering and developing small molecule drugs to treat diseases of aging such as Type 2 Diabetes, announced today that it has been named to the annual FierceBiotech “Fierce 15" list. The complete list of ‘Fierce 15' companies is available in today’s issue of FierceBiotech and on the FierceBiotech Web site at www.fiercebiotech.com.