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Quercetin and Kaempferol Glycosides from Ficaria verna Flowers and Tgheir Structure Studied by 2D NMR Spectroscopy

Tomczyk M., J. Gudej J.

Polish Journal of Chemistry

2002

Vol. 76 / nr 11

1601-1605

From the flowers of Ficaria verna Huds. (Ranunculaceae), two flavonol triglycosides were isolated and their structures were elucidated by spectroscopic analysis (UV, NMR, MS) as 3-O-[_-L-rhamnopyranosyl-(1_6)-_-D-glucopyranosyl]-7-O-(_-D-glucopyranosyl) - quercetin (1) and 3-O-[_-L-rhamnopyranosyl-(1_6)-_-D-glucopyranosyl]-7- O-(_-D-glucopyranosyl) - kaempferol (2). In addition, the structure of 1 was determined using homo- and heteronuclear 2D NMR techniques.