1-(10,11-Dihydro-8-(methylthio)dibenzo(b,f)thiepin-10-yl)piperazine maleate 34775-79-6 Piperazine, 1-(10,11-dihydro-8-(methylthio)dibenzo(b,f)thiepin-10-yl)-, (Z)-2-butenedioate (1:1)