1-Methyl-4-(6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl)piperazine dihydrochloride 35047-52-0 5-(4-Methylpiperazino)-6,7,8,9-tetrahydro-5H-benzocycloheptene dihydrochloride Piperazine, 1-methyl-4-(6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl)-, dihydrochloride