1-amino-4-[3-(isopropylamino)carbonylanilino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonic acid, sodium salt

1-Amino-9,10-dihydro-4-[[3-[[(1-methylethyl)amino]carbonyl]phenyl]amino]-9,10-dioxo-2-anthracenesulfonic acid/sodium,(1:x) salt