4-22-00-00566 (Beilstein Handbook Reference) 4-Pyridinecarboxylic acid, 2-(2-butenylidene)hydrazide 7007-96-7 BRN 0136132 CIH Crotonaldehyde isonicotinic acid hydrazone Crotoniazida [INN-Spanish] Crotoniazide [DCF:INN] Crotoniazidum [INN-Latin] ISONICOTINIC ACID, (2-BUTENYLIDENE)HYDRAZIDE Isonicotinic acid 2-butenylidenehydrazide N'-Crotonalideneisoniazid