1-Piperazineacetamide, 4-methyl-N-phenyl-, (Z)-2-butenedioate (1:2) 118989-76-7 2-(4-Methyl-1-piperazinyl)-N-phenylacetamide (Z)-2-butenedioate (1:2) Acetamide, 2-(4-methyl-1-piperazinyl)-N-phenyl-, (Z)-2-butenedioate (1:2) N-Phenyl-2-(4-methyl-1-piperazinyl)acetamide dimaleate