1-Methyl-4-(2,3,4,5-tetrahydro-1-benzothiepin-5-yl)piperazine maleate (1:2) 21699-87-6 Piperazine, 1-methyl-4-(2,3,4,5-tetrahydro-1-benzothiepin-5-yl)-, maleate (1:2)