WALTHAM, Mass.--(BUSINESS WIRE)--Oscient Pharmaceuticals Corporation (Nasdaq: OSCI) today announced the expiration and final results of its previously announced exchange offer for its outstanding 3.50% Convertible Senior Notes due 2011 (the “Existing Notes”). Approximately $213 million in aggregate principal amount, or 94.4% of the total outstanding amount of the Existing Notes was tendered and not withdrawn in the exchange offer which expired at 11:59 p.m., New York City time, on November 21, 2008.