disodium 5-(p-acetamidoanilino)-8-amino-9,10-dihydro-9,10-dioxoanthracene-1,7-disulphonate

5-[[4-(Acetylamino)phenyl]amino]-8-amino-9,10-dihydro-9,10-dioxo-1,7-anthracenedisulfonic acid disodium salt