香豆素-3-羧酸

2-(2-oxo-3,4-dihydrochromen-4-yl)acetic acid

3-(2-hydroxy-phenyl)-glutaric acid

2-[4-[(Z)-(3-methyl-5-oxo-1H-pyrazol-4-ylidene)methyl]phenoxy]-N'-[(Z)-(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]acetohydrazide

6-(methylaminomethylidene)cyclohexa-2,4-dien-1-one