4-(7,8-Dihydrobenzo(b)naphtho(2,1-f)thiepin-7-yl)-4-methylpiperazine maleate 56057-09-1 7-(4-Methylpiperazino)-7,8-dihydrobenzo(b)naphtho(2,1-f)thiepin maleate Piperazine, 4-(7,8-dihydrobenzo(b)naphtho(2,1-f)thiepin-7-yl)-4-methyl-, (Z)-2-butenedioate (1:1)