Structure-Antioxidant Activity Relationship of Some Flavonoids Isolated from Warionia saharae (Asteraceae)

摘要

The antioxidant behaviour of flavonoids including flavone, flavanol and isoflavone isolated from leaves of 'Warionia saharae and the related activity-structure relationships were investigated by measuring their abilty to scavenge the free radical 2,2-diphenylpicrylhydrazyl show that the antioxidant activity depends both on substitution of hydroxyl groups of the flavonoids skeleton and the presence of an unsaturation at the C2 -C3 bond in conjugation with 4 oxo function.