Flavoniods from roots of Flemingia philippinensis Comparative study on in vitro anti-free radical activities of quercetin,isoquercetin, and rutin Analysis of total flavonoids and free radical scavengingactivities in different Lycium barbarum cultivars Chemical Constituents in the Leaves of Alsophila spinulosa Isolation and structural elucidation of flavonoids from Ancecotochilus roxburghii Advances in studies on absorption, distribution, metabolism of flavonoids