1-Piperazinecarbothioic acid, 4-formyl-, (1-(2-pyridinyl)ethylidene)hydrazide 1'-oxide 1-Piperazinecarboxylic acid, 4-formylthio-, (1-(2-pyridyl)ethylidene)hydrazide 1'-oxide 87587-09-5 BRN 5607526