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Achillion Pharmaceuticals, Inc.

Drug Names(s): Elvucitabine

Description: Elvucitabine is an L-cytosine nucleoside analog reverse transcriptase inhibitor (NRTI) that has demonstrated potent antiviral activity against HIV, including strains resistant to other NRTIs. The L-nucleoside configuration of the compound may provide protection against mitochondrial toxicity, a serious side effect often seen with D-nucleosides. Elvucitabine has been demonstrated to have a longer half-life than other approved NRTIs, providing a potential barrier to the emergence of drug resistance in patients who are less than perfectly compliant.

Deal Structure: Achillion and GCAT
In February 2010, Achillion announced the execution of a license agreement for elvucitabine for the treatment of both hepatitis B virus (HBV) infection and human immunodeficiency virus (HIV) infection with GCA Therapeutics (GCAT). The exclusive license grants GCAT the right, through its Chinese joint venture with Tianjing Institute of Pharmaceutical Research, to clinically develop and commercialize elvucitabine in mainland China, Hong Kong, and Taiwan.

Under the terms of the agreement, GCAT, through a sublicense agreement with its Chinese joint venture, T & T Pharma Co., Ltd., formed with Tianjing Institute of Pharmaceutical Research (TIPR), will assume all development and regulatory responsibility and associated costs for elvucitabine, and Achillion will be eligible to receive development milestones and double-digit royalties on net sales in those territories.

Partners: GCA Therapeutics, Ltd.

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