3-Ethyl-4H-1-benzopyran-2-carboxylic acid hydrazide 4H-1-Benzopyran-2-carboxylic acid, 3-ethyl-, hydrazide DJ2283000 Hydrazide de l'acide 3-ethyl chromone-2-carboxylique [French] Hydrazide de l'acide 5-6-benzo 3-ethyl comanique [French] L.B.C. 216