1-(6,7-Dihydro-5H-benzocyclohepten-7-yl)-4-methylpiperazine (E)-2-butenedioate (1:2) 62819-66-3 7-(4-Methylpiperazin-1-yl)-6,7-dihydro(5H)benzocycloheptene difumarate Piperazine, 1-(6,7-dihydro-5H-benzocyclohepten-7-yl)-4-methyl-, (E)-2-butenedioate (1:2)