benzyl 4-[(1-butyl-5-cyano-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin-3-yl)azo]benzoate

4-[(1-Butyl-5-cyano-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo]benzoic acid, phenylmethyl ester

4-[[(1-Butyl-5-cyano-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin)-3-yl]azo]benzoic acid phenylmethyl ester

Benzoic acid, 4-(1-butyl-5-cyano-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo-, phenylmethyl ester