2,3-Dimethoxy-10-(4-methylpiperazino)-10,11-dihydrodibenzo(b.f)thiepin dimaleate hemihydrate 60969-97-3 Piperazine, 1-(10,11-dihydro-2,3-dimethoxydibenzo(b,f)thiepin-10-yl)-4-methyl-, (Z)-2-butenedioate, hydrate (2:4:1)