Synonyms: 2-Pyrrolidinone,1-ethyl-4-(2-morpholinoethyl)-3,3-diphenyl-, monohydrochloride, monohydrate(8CI); 2-Pyrrolidinone, 1-ethyl-4-[2-(4-morpholinyl)ethyl]-3,3-diphenyl-,monohydrochloride, monohydrate (9CI);1-Ethyl-4-(2-morpholinoethyl)-3,3-diphenyl-2-pyrrolidinone hydrochloridehydrate; AHR 619; Doxapram hydrochloride hydrate; Doxapram hydrochloridemonohydrate;