sodium 4-[[9,10-dihydro-9,10-dioxo-4-(p-tolylamino)-1-anthryl]amino]toluene-3-sulphonate

2-[(9,10-Dihydro-4-(4-methylanilino)-9,10-dioxoanthracen-1-yl)amino]-5-methyl-1-benzenesulfonic acid sodium salt