1-Piperazinepropanenitrile, 4-(6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yl)-, (Z)-2-butenedioate (1:1) 2-(4-(2-Cyanoethyl)piperazino)-6,7,8,9-tetrahydro-5H-benzocycloheptene maleate 4-(6,7,8,9-Tetrahydro-5H-benzocyclohepten-2-yl)-1-piperazinepropanenitrile maleate 51490-35-8