Sodium 1-amino-9,10-dihydro-9,10-dioxo-4-o-toluidinoanthracene-2-sulfonate

2-anthraquinonesulfonic acid, 1-amino-4-[(2-methylphenyl)amino]-, sodium salt ; 2-anthracenesulfonic acid, 1-amino-9,10-dihydro-4-[(2-methylphenyl)amino]-9,10-dioxo-, monosodium salt ; 1-amino-9,10-dihydro-4-[(2-methylphenyl)amino]-9,10-dioxo-2-anthracenesulfonic acid sodium salt ; sodium 1-amino-9,10-dihydro-9,10-dioxo-4-o-toluidinoanthracene-2-sulfonate ; sodium 1-amino-9,10-dihydro-9,10-dioxo-4-o-toluidinoanthracene-2-sulphonate