Flavonoids from Cephalaria gigantea flowers
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Abstract
Luteolin, quercetin, cinaroside, quercimeritrin, and the new flavonol bioside gigantoside A were isolated from Cephalaria gigantea (Ledeb.) Bobr. (Dipsacaceae) flowers. Spectral properties and chemical transformations established that gigantoside A had the structure quercetin-7-O-[α-L-arabinopyranosyl(1→6)]-β-D-glucopyranoside.
Key words
Cephalaria gigantea (Ledeb.) Bobr Dipsacaceae flavonoids luteolin quercetin cinaroside quercimeritrin gigantoside A 1H and 13C NMR spectra DEPT 2D NMR (COSY, HMQC, HMBC, NOESY)Preview
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