tetrasodium 4,4'-[(1,4-dioxo-2-butene-1,4-diyl)bis[imino(3-sulphonato-4,1-phenylene)imino]]bis[1-amino-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate]

2-Anthracenesulfonic acid, 4,4'-[(1,4-dioxo-2-butene- 1,4-diyl)bis[imino(3-sulfo-4,1-phenylene)imino]]bis [1-amino-9,10-dihydro-9,10-dioxo-, tetrasodium salt

4,4'-[(1,4-Dioxo-2-butene-1,4-diyl)bis[imino(3-sodiooxysulfonyl-4,1-phenylene)imino]]bis(1-amino-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid)disodium salt