1-(10,11-Dihydrodibenzo(b,f)thiepin-10-yl)-4-(diphenylmethyl)piperazine dimethanesulfonate 121943-09-7 Piperazine, 1-(10,11-dihydrodibenzo(b,f)thiepin-10-yl)-4-(diphenylmethyl)-, dimethanesulfonate