1-(2-(2-p-Chlorophenylthiophenyl)ethyl)-4-methylpiperazine di(hydrogen maleate) 65999-58-8 Piperazine, 1-(2-(2-((4-chlorophenyl)thio)phenyl)ethyl)-4-methyl-, (Z)-2-butenedioate (1:2) VUFB-12389