1,6-Dihydro-6-oxo-3-pyridinecarboxylic acid 2-Pyridone-5-carboxylic acid 3-Pyridinecarboxylic acid, 1,6-dihydro-6-oxo- 4588-15-2 5006-66-6 6-Hydroxynicotinic acid AI3-52404 EINECS 225-682-9 NSC 35054 NSC 53377 NSC 8620 Nicotinic acid, 1,6-dihydro-6-oxo- (8CI)