Table I.

Quercetin glucoside content of 6 vegetables of the genus Allium, as detected by high performance liquid chromatography.

	Quercetin glucoside content, mg/100 g dry weight
Allium species	3,4′-Qdg	3-Qmg	4′-Qmg
Allium cepa L.	714±47	37±2.8	619±19
Allium sativum	ND	ND	ND
Allium fistulosum L. leaf	202±20	ND	ND
Allium fistulosum L. stalk	472±3.6	ND	42
Allium chinense leaf	77±2.2	ND	ND
Allium chinense stalk	ND	ND	ND

Data are expressed as the mean ± standard deviation (n=2). 3,4′-Qdg, quercetin-3,4′-di-O-glucoside; 3-Qmg, quercetin 3-β-D-glucoside; 4′-Qmg, quercetin-4′-O-glucoside; ND, not detected.