trisodium 1-amino-4-[[4-[[4-[[4-[(4-amino-9,10-dihydro-9,10-dioxo-3-sulphonato-1-anthryl)amino]phenyl]amino]-1,4-dioxobut-2-enyl]amino]-3-sulphonatophenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate

2-Anthracenesulfonic acid, 1-amino-4-[[4-[[4-[[4-[(4- amino-9,10-dihydro-9,10-dioxo-3-sulfo-1-anthracenyl )amino]phenyl]amino]-1,4-dioxo-2-butenyl]amino ]-3-sulfophenyl]amino]-9,10-dihydro-9,10-dioxo-, trisodium salt