Antioxidative flavanone glycosides from the branches and leaves of Viscum coloratum

Document Type

Article

Publication Date

1-1-2006

Abstract

Two new flavanone glucosides, (2S)-homoeriodictyol 7,4′-di-O-β- D-glucopyranoside (4) and (2R)-eriodictyol 7,4′-di-O-β-D- glucopyranoside (5) were isolated from the branches and leaves of Viscum coloratum (KOMAR) NAKAI (Loranthaceae), along with three known flavanone glucosides: (2S)-homoeriodictyol 7-O-β-D-glucopyranoside (1), (2S)-eriodictyol 7-O-β-D-glucopyranoside (2), and (2S)-naringenin 7-O-β-D-glucopyranoside (3). The structures of these compounds were elucidated using spectroscopic methods. The antioxidant activities of these isolated compounds were evaluated by colorimetric methods based on their scavenging effects on hydroxyl radicals and superoxide anion radicals, respectively. All the compounds showed potent albeit varied degrees of antioxidative activities and the structure-activity relationship is discussed. © 2006 Pharmaceutical Society of Japan.

Publication Source (Journal or Book title)

Chemical and Pharmaceutical Bulletin

First Page

133

Last Page

135

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