5-[4-[2-(2-Methoxyethoxy)ethoxycarbonyl]phenylazo]-3-cyano-1-ethyl-6-hydroxy-4-methyl-2-pyridone

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

4-[(5-Cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo]benzoic acid, (2-methoxyethoxy)ethyl ester

4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-3-pyridinyl)azo]-benzoic aci 2-(2-methoxyethoxy)ethyl ester

4-[[(5-Cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin)-3-yl]azo]benzoic acid 2-(2-methoxyethoxy)ethyl ester

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