1-(2-Benzylbenzyl)-4-acetylpiperazine hydrogen maleate 1-Acetyl-4-((2-(phenylmethyl)phenyl)methyl)piperazine maleate 37652-71-4 Piperazine, 1-acetyl-4-((2-(phenylmethyl)phenyl)methyl)-, (Z)-2-butenedioate