sodium 1-amino-4-[3-[[(2,3-dichloro-6-quinoxalinyl)sulphonyl]sulphamoyl]-2,6-dimethylphenyl]amino-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate

1-Amino-4-[[3-[[[(2,3-dichloroquinoxalin-6-yl)sulfonyl]amino]sulfonyl]-2,6-dimethylphenyl]amino]-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid sodium salt