109-10-4 142-08-5 168275-26-1 2(1H)-Pyridinone 2(1H)-Pyridone 2(lH)-Pyridinone 2-HYDROXYPYRIDINE 2-Oxopyridine 2-Pyridinol 2-Pyridinone 2-Pyridone 77846-86-7 AI3-19236 EINECS 205-520-3 NSC 172522 Pyridone-2 [French] alpha-Pyridone