1120-96-3 123574-65-2 2(1H)-PYRIDINETHIONE 2-Mercaptopyridine 2-Pyridinethiol 2-Thiopyridine 2637-34-5 EINECS 220-131-9 NSC 41337 Pyrid-2-thione Pyridine-2-thiol Thiopyridone-2 [French]