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Structural determination of quercusides A and B, new flavonoid glucosides from Quercus incana, by 1D and 2D NMR spectroscopy

✍ Scribed by Benish Iftikhar; Shagufta Perveen; Abdul Malik; Najma Sultana; Saeed Arayne; Pir Muhammad

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 99 KB
Volume: 47
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.2426

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✦ Synopsis

Abstract

Quercusides A and B, new flavonoid glucosides have been isolated from the chloroform soluble fractions of Quercus incana. Their structures were assigned from ^1^H and ^13^C nuclear magnetic resonance spectra, distortionless enhancement by polarization transfer (DEPT) and by correlation spectroscopy, heteronuclear multiple quantum correlation (HMQC) and heteronuclear multiple bond correlation (HMBC) experiments. Lupeol, β‐sitosterol and ursolic acid have also been reported from this species. Copyright © 2009 John Wiley & Sons, Ltd.

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