ETHYL 4-HYDROXY-6-METHOXYQUINOLINE-3-CARBOXYLATE METHYL 5-BROMO-2-OXO-1,2-DIHYDRO-3-PYRIDINECARBOXYLATE Methyl 5-hydroxynicotinate METHYL 6-OXO-1,6-DIHYDRO-3-PYRIDINECARBOXYLATE Nicotinic acid Methyl nicotinate 4-HYDROXY-6-METHYL-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER ETHYL 4-HYDROXY-2-PHENYLQUINOLINE-3-CARBOXYLATE 8-CHLORO-4-HYDROXY-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER 4-HYDROXY-5,8-DIMETHYL-QUINOLINE-3-CARBOXYLIC ACID ETHYL ESTER