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  • Title: Antioxidant flavonoids and phenolic acids from leaves of Leea guineense G Don (Leeaceae).
    Author: Op de Beck P, Cartier G, David B, Dijoux-Franca MG, Mariotte AM.
    Journal: Phytother Res; 2003 Apr; 17(4):345-7. PubMed ID: 12722137.
    Abstract:
    From leaves of Leea guineense (Leeaceae) three hydrophilic flavonoids were isolated and identified as quercetin-3'-sulphate-3-O-alpha-L-rhamnopyranoside, quercetin-3,3'-disulphate and a new flavonoid sulphate, quercetin-3,3',4'-trisulphate, together with kaempferol, quercetin, quercitrin, mearnsitrin, gallic acid and ethyl gallate. The structures were established by spectroscopic analysis (UV, MS, (1)H-NMR, (13)C-NMR and 2D-NMR). Their antioxidant effect on free radical scavenging was evaluated in the DPPH assay.
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