1-Methyl-4-((6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yl)methyl)piperazine dimaleate 55037-65-5 Piperazine, 1-methyl-4-((6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yl)methyl)-, (Z)-2-butenedioate (1:2)