WALTHAM, Mass. & SAINT-CLOUD, France--(BUSINESS WIRE)--Oscient Pharmaceuticals Corporation (the “Company”) (Nasdaq: OSCI) today announced that it, its wholly owned subsidiary Guardian II Acquisition Corporation, and its licensor, Ethypharm SA, have filed a lawsuit against Lupin Limited and its subsidiary Lupin Pharmaceuticals, Inc. (“Lupin”) in the United States District Court for the District of Maryland for infringement of U.S. Patent No. 7,101,574 (the “‘574 Patent”), which covers ANTARA® (fenofibrate) capsules.