3-Carboxy-2-pyridone, 2-Oxo-1,2-dihydropyridine-3-carboxylic acid, 2-hydroxyl nicotinic acid, 2-hydroxy-3-nicotinic acid, 2-hydroxy-3-carboxypyridine, 3-Pyridinecarboxylic acid, 1,2-dihydro-2-oxo-, 2-Hydroxynicotinicacid, 2-Hydroxy-3-picolinic acid, 2-Hydroxynicotinic a, 2-oxy-pyridine-3-carboxylic acid, 2-hydroxypyridine-3-carboxylic acid, 2-hydroxynicotininic acid