3-[[5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-sulphophenyl]azo]-1,2-dihydro-6-hydroxy-2-oxoisonicotinic acid

3-[[5-[(4,6-Dichloro-1,3,5-triazin-2-yl)amino]-2-sulfophenyl]azo]-1,2-dihydro-6-hydroxy-2-oxo-4-pyridinecarboxylic acid