Synonyms: 4-Pyridinecarboxylicacid,3-[[4-[7-[(5-chloro-2,6-difluoro-4-pyrimidinyl)amino]-5,9-disulfo-2H-naphtho[1,2-d]triazol-2-yl]-2-sulfophenyl]azo]-1,2-dihydro-6-hydroxy-2-oxo-,sodium salt (9CI); 2H-Naphtho[1,2-d]triazole, 4-pyridinecarboxylic acid deriv.