83400-20-8

3-[[4-[7-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]-5,9-disulpho-2H-naphtho[1,2-d]triazol-2-yl]-2-sulphophenyl]azo]-1,2-dihydro-6-hydroxy-2-oxoisonicotinic acid, sodium salt