109-10-4 (DELETED) 142-08-5 168275-26-1 (DELETED) 2(1H)-Pyridinone 2-Hydroxypyridine 2-Oxopyridine 2-Pyridinol 2-Pyridinone 2-Pyridone 77846-86-7 (DELETED AIDS-081857 AIDS081857 NSC172522 alpha-Pyridone