1-Piperazineethanol, 4-(10,11-dihydro-2-(methylthio)dibenzo(b,f)thiepin-10-yl)-, (Z)-2-butenedioate (1:2) 4-(10,11-Dihydro-2-(methylthio)dibenzo(b,f)thiepin-10-yl)-1-piperazineethanol maleate (1:2) 57536-83-1