1-Piperazineacetamide, 4-methyl-N-(2-(phenylmethyl)phenyl)-, (Z)-2-butenedioate (1:2) 118989-86-9 Acetamide, 2-(4-methyl-1-piperazinyl)-N-(2-(phenylmethyl)phenyl)-, (Z)-2-butenedioate (1:2) N-(2-Benzylphenyl)-2-(4-methyl-1-piperazinyl)acetamide bis(hydrogen maleate)