Journal
MAGNETIC RESONANCE IN CHEMISTRY
Volume 47, Issue 7, Pages 605-608Publisher
WILEY
DOI: 10.1002/mrc.2426
Keywords
NMR; H-1 NMR; C-13 NMR; quercuside A; quercuside B; flavonoids; Quercus incana
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Quercusides A and B, new flavonoid glucosides have been isolated from the chloroform soluble fractions of Quercus incana. Their structures were assigned from H-1 and C-13 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, beta-sitosterol and ursolic acid have also been reported from this species. Copyright (c) 2009 John Wiley & Sons, Ltd.
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