2-ethoxy-2-oxoethyl 4-[(5-cyano-1,6-dihydro-2-hydroxy-1,4-dimethyl-6-oxopyridin-3-yl)azo]benzoate

4-[(5-Cyano-1,6-dihydro-2-hydroxy-1,4-dimethyl-6-oxopyridin)-3-ylazo]benzoic acid 2-ethoxy-2-oxoethyl ester