1-Amino-4-((4-((3-((2-chloroethyl)sulphonyl)benzoyl)methylamino)-2-sulphophenyl)amino)-9,10-dihydro-9,10-dioxoanthracene-2-sulphonicacid, 1-amino-4-[[4-[[3-[(2-chloroethyl)sulphonyl]benzoyl]methylamino]-2-sulphophenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid, 1-Amino-4-[[4-[[3-[(2-chloroethyl)sulfonyl]benzoyl]methylamino]-2-sulfophenyl]amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid