1-((6,7,8,9-Tetrahydro-5H-benzocyclohepten-2-yl)methyl)piperazine dimaleate 55037-85-9 Piperazine, 1-((6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yl)methyl)-, (Z)-2-butenedioate (1:2)