DOSY NMR applied to analysis of flavonoid glycosides from Bidens sulphurea.
2009
2D DOSY 1H NMR has proved to be a useful technique in the identification of the molecular skeleton of the four major compounds of ethyl acetate extract of aerial parts of Bidens sulphurea (Asteraceae). The combination of this technique with HPLC, mass spectrometry and other NMR techniques enabled the identification of four flavonoid glycosides: quercetin-3-O-β-D-galactopyranoside, quercetin-3-O-β-D-glycopyranoside, quercetin-3-O-α-L-arabinofuranoside and quercetin-3-O-β-D-rhamnopyranoside. Copyright © 2009 John Wiley & Sons, Ltd.
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