disodium 1-amino-9,10-dihydro-9,10-dioxo-4-[[3-sulphonato-4-[(2,5,6-trichloropyrimidin-4-yl)amino]phenyl]amino]anthracene-2-sulphonate

1-Amino-9,10-dihydro-9,10-dioxo-4-[[3-sulfo-4-[(2,5,6-trichloro-4-pyrimidinyl)amino]phenyl]amino]-2-anthracenesulfonic acid disodium salt