tripotassium 4-[(4-amino-9,10-dihydro-9,10-dioxo-3-sulphonato-1-anthryl)amino]-6-[[5-chloro-6-methyl-2-(methylsulphonyl)pyrimidin-4-yl]amino]benzene-1,3-disulphonate

4-[[4-Amino-9,10-dihydro-9,10-dioxo-3-(potassiosulfo)anthracen]-1-ylamino]-6-[5-chloro-6-methyl-2-(methylsulfonyl)pyrimidin-4-ylamino]-1,3-benzenedisulfonic acid dipotassium salt