Novel Methods for Preparation of (+)-1-ethyl-4-[2-(4-morpholinyl)ethyl)-3,3-diphenyl-2-pyrrolidinone and Salts Thereof
申请人:Dax Scott L.
公开号:US20130109854A1
公开(公告)日:2013-05-02
The present invention includes a method of preparing a composition comprising (+)-doxapram or a salt thereof, wherein the composition is essentially free of (−)-doxapram or a salt thereof.