2-Chloro-8-fluoro-4-(4-methylpiperazino)-4,5-dihydrothieno(2,3-b)-1-benzothiepin bis(maleate) 81223-57-6 Piperazine, 1-(2-chloro-8-fluoro-4,5-dihydrothieno(2,3-b)(1)benzothiepin-4-yl)-4-methyl-, (Z)-2-butenedioate (1:2)