sodium 8-[[4-(acetylmethylamino)phenyl]amino]-9,10-dihydro-5-[(1-methylethyl)amino]-9,10-dioxoanthracene-1-sulphonate

8-[[4-[Acetyl(methyl)amino]phenyl]amino]-9,10-dihydro-5-[(1-methylethyl)amino]-9,10-dioxo-1-anthracenesulfonic acid sodium salt