水杨酰胺

(6Z)-6-[(5E)-5-(6-oxocyclohexa-2,4-dien-1-ylidene)-1,3,4-oxadiazolidin-2-ylidene]cyclohexa-2,4-dien-1-one

N-(3-oxo-2,3-dihydro-1H-pyrazol-4-yl)-benzamide

二水杨酰肼

3-羟基-1H-吲唑