2-[[4,5-Dihydro-3-methyl-4-[[4-[[4-[[2-methyl-4-[(2,5,6-trichloro-4-pyrimidinyl)amino]phenyl]azo]benzoyl]amino]-2-sulfophenyl]azo]-5-oxo-1H-pyrazol]-1-yl]-1,4-benzenedisulfonic acid

2-[4,5-dihydro-3-methyl-4-[[4-[[4-[[2-methyl-4-[(2,5,6-trichloropyrimidin-4-yl)amino]phenyl]azo]benzoyl]amino]-2-sulphophenyl]azo]-5-oxo-1H-pyrazol-1-yl]benzene-1,4-disulphonic acid