1-(8-Chlorodibenzo(b,f)thiepin-10-yl)-4-(2-propynyl)piperazine maleate 34661-55-7 Piperazine, 1-(8-chlorodibenzo(b,f)thiepin-10-yl)-4-(2-propynyl)-, (Z)-2-butenedioate (1:1)