doi: 10.1021/np0703850.
Epub 2007 Oct 9.
Antioxidant flavonoid glycosides from aerial parts of the fern Abacopteris penangiana
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- PMID: 17922550
- DOI: 10.1021/np0703850
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Antioxidant flavonoid glycosides from aerial parts of the fern Abacopteris penangiana
J Nat Prod.
2007 Oct.
Abstract
Five new flavan-4-ol glycosides, abacopterins E-I ( 5- 9), and seven known flavonoid glycosides ( 3 and 10- 15) were isolated from the aerial parts of the fern Abacopteris penangiana. Their structures were elucidated on the basis of extensive spectroscopic analysis, including HSQC, HMBC, (1)H- (1)H COSY, and ROESY, and chemical evidence. The isolated glycosides were evaluated for their antioxidant activity using the TEAC assay, and compounds 3, 5- 8, 10, 11, 14, and 15 showed TEAC values of 1.03-1.91 mM.
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