sodium 1-amino-9,10-dihydro-4-[[4-(1,1-dimethylethyl)-2-methylphenyl]amino]-9,10-dioxoanthracene-2-sulphonate

1-Amino-4-[4-(1,1-dimethylethyl)-2-methylphenylamino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt