4-Pyridinecarboxylic acid, (1-(2-pyridinyl)ethylidene)hydrazide 5-22-02-00272 (Beilstein Handbook Reference) 93086-96-5 BRN 0405098 ISONICOTINIC ACID, (1-(2-PYRIDYL)ETHYLIDENE)HYDRAZIDE Isonicotinylhydrazone de la 2-acetylpyridine [French]