Antioxidant and Antidiabetic Effects of Flavonoids: A Structure-Activity Relationship Based Study

Table 4

Chemical structures and substituents of selected flavonoids.

Class	Compound	Chemical structure	Substituents
			3	5	7	8	3′	4′
Flavone	Wogonin		H	OH	OH	OCH3	H	H
	Methyl ether (wogonin)		H	OCH3	OCH3	OCH3	H	H
	Acetate (wogonin)		H	CH3COO	CH3COO	OCH3	H	H
	Techtochrysin		H	OH	OCH3	H	H	H
	8-Hydroxy-7-methoxy flavone		H	H	OCH3	OH	H	H
	Chrysin		H	OH	OH	H	H	H
	Norwogonin		H	OH	OH	OH	H	H
	Acetate (norwogonin)		H	CH3COO	CH3COO	CH3COO	H	H
	Isoscutellarein		H	OH	OH	OH	H	OH
	Hypolaetin		H	OH	OH	OH	OH	OH
Flavonol	Kaempferol		OH	OH	OH	H	H	OH
	Quercetin		OH	OH	OH	H	OH	OH
Flavanol	(+)-Catechin (2R,3S)		β-OH	OH	OH	H	OH	OH
	(−)-Epicatechin (2R,3R)		α-OH	OH	OH	H	OH	OH