1-(3-(4-(Diphenylmethyl)-1-piperazinyl)propyl)-2-pyrrolidinone dihydrochloride hydrate 109758-21-6 2-Pyrrolidinone, 1-(3-(4-(diphenylmethyl)-1-piperazinyl)propyl)-, dihydrochloride, hydrate M.G. 16220