Synonyms:
4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl)azo]benzene-1,3-disulphonic acid ; 4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridyl)azo]benzene-1,3-disulfonic acid ; 1,3-benzenedisulfonicacid, 4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo]-(9ci) ; 1,3-benzenedisulfonicacid,4-[2-(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)diazenyl]- ; 4-[[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin)-3-yl]azo]-1,3-benzenedisulfonic acid