1-Piperazineacetic acid, 4-(8-chloro-10,11-dihydrodibenzo(b,f)thiepin-10-yl)-, ethyl ester, (Z)-2-butenedioate (1:1) 34775-70-7 Ethyl 4-(8-chloro-10,11-dihydrodibenzo(b,f)thiepin-10-yl)-1-piperazineacetate maleate