1-Benzyl-4-(3-phenyl-4-methylphenyl)piperazine oxalate 1-Benzyl-4-(6-methyl-1,1'-biphenyl-3-yl)piperazine oxalate 13480-29-0 Piperazine, 1-benzyl-4-(6-methyl-1,1'-biphenyl-3-yl)-, oxalate