1-(4-Methanesulfonylphenacyl)-4-phenylpiperazine maleate 50648-51-6 ETHANONE, 1-(4-(METHYLSULFONYL)PHENYL)-2-(4-PHENYL-1-PIPERAZINYL)-, (Z)-2-BUTENE Ethanone, 1-(4-(methylsulfonyl)phenyl)-2-(4-phenyl-1-piperazinyl)-, (Z)-2-butenedioate (1:1) Mesylphenacyrazine Mesylphenacyrazine maleate VUFB8752