1-Methyl-4-(1-oxo-4,4-diphenylbutyl)piperazine monohydrochloride 106002-98-6 4,4-Diphenylbutyric acid, N-methylpiperazinyl amide, hydrochloride Piperazine, 1-methyl-4-(1-oxo-4,4-diphenylbutyl)-, monohydrochloride