A New Acylated Flavonol Glycoside and Antioxidant Effects of Hedyotis diffusa

Abstract

A study on the bioactive principles of Hedyotis diffusa Willd., led to the isolation of a new acyl flavonol di-glycoside which was characterized as kaempferol 3-O[2″-O-(E-6′′′-O-feruloyl)-β-D-glucopyranosyl]-β-D-galactopyranoside by spectral and chemical methods from the methanolic extract. In addition, three known flavonol glycosides and six known iridoid glycosides were also obtained. The above-mentioned glycosides were tested for antioxidant effects on xanthine oxidase inhibition, xanthine-xanthine oxidase cytochrome c and TBA-MDA systems.

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