2-(二苯基亚膦酰)-乙酸2-[(2,4-二羟基苯基)亚甲基]酰肼

[(2-氧代-2H-苯并吡喃-7-基)氧基]乙酸

N-(4-chlorophenyl)-N-hydroxy-2-[(2-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylhydrazinylidene]propanimidamide

7-甲氧基香豆素-3-羧酸

3-氰基-7-羟基香豆素