1-(4-(4-(Diphenylmethyl)-1-piperazinyl)butyl)-6-phenyl-2-piperidinone ethanedioate 109758-28-3 2-Piperidinone, 1-(4-(4-(diphenylmethyl)-1-piperazinyl)butyl)-6-phenyl-, ethanedioate M.G. 16246