10-(4-Methylpiperazino)-2-nitro-10,11-dihydrodibenzo(b,f)thiepin dimethanesulfonate 64695-19-8 Piperazine, 1-(10,11-dihydro-2-nitrodibenzo(b,f)thiepin-10-yl)-4-methyl-, dimethanesulfonate VUFB-12284