| In vitro: |
| Chinese Journal of Experimental Traditional Medical Formulae, 2013, 19(21):77-81. | | Chemical Constituents of Viola yedoensis and Their Antioxidant Activity.[Reference: WebLink] | To investigate the chemical constituents of Viola yedoensis and their antioxidant activity.
METHODS AND RESULTS:
A systematic isolation was performed by various column chromatography with the n-butanol fraction of the ethanolic extract of the herb. Eleven compounds were isolated and identified as kaempferol-3-O-β-D-sophorosyl-7-O-α-L-rhamnopyrano-side(1),kaempferol-3,7-di-O-α-L-rhamnopyranoside(2),apigenin-6,8-di-C-β-D-glucopyranoside(3),adenosine(4),esculetin(5),Apigenin 6-C-alpha-L-arabinopyranosyl-8-C-beta-D-xylopyranoside(6),apigenin-6-C-β-D-glucopyranosyl-8-C-α-L-arabinopyranoside(7),apigenin-6-C-β-D-glucopyranosyl-8-C-β-D-xylopyranoside(8),apigenin-6,8-di-C-α-L-arabinopyranoside(9),apigenin-6-C-β-D-glucopyranosyl-8-C-β-L-arabinopyranoside(10) and kaempferol-3-O-β-D-glucopyranosyl-7-O-α-L-rhamnopyranoside(11),respectively. All compounds were evaluated for antioxidant capacity against DPPH radicals,and compounds 1-5 and 11 showed antioxidant activities.
CONCLUSIONS:
Compound 2 was reported from Viola yedoensis for the first time,and compounds 1 and 8 were the first time to be isolated from the genus Viola. |
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