1-(4-Cyclopentylphenyl)-2-(4-methyl-1-piperazinyl)ethanone (Z)-2-butenedioate (1:2) 4-Cyclopentylphenyl 4'-methylpiperazinomethyl ketone bis(hydrogen maleate) 85689-79-8 ETHANONE, 1-(4-CYCLOPENTYLPHENYL)-2-(4-METHYL-1-PIPERAZINYL)-, (Z)-2-BUTENEDIOAT Ethanone, 1-(4-cyclopentylphenyl)-2-(4-methyl-1-piperazinyl)-, (Z)-2-butenedioate (1:2)