4-[[(4-Amino-9,10-dihydro-9,10-dioxo-3-sulfoanthracen)-1-yl]amino]-6-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-1,3-benzenedisulfonic acid trisodium salt
4-[[(4-Amino-9,10-dihydro-9,10-dioxo-3-sulfoanthracen)-1-yl]amino]-6-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-1,3-benzenedisulfonic acid trisodium salt