Flavonoids of the epigeal part ofRhodiola rosea. II. Structures of new glycosides of herbacetin and of gossypetin
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Abstract
The structure of four new flavonol glycosides isolated from the epigeal part ofRhodiola rosea have been established: 7-O-α-L-rhamnopyranosylgossypetin (rhodiolgin), 8-O-β-D-glucopyranosyl-7-O-α-L-rhamnopyranosylgossypetin (rhodiolgidin), 8-O-β-D-glucopyranosol-7-O-α-L-rhamnopyranosylherbacetin (rhodionidin), and 3-O-β-D-glucopyranosyl-8-O-β-D-xylopyranosylherbacetin (rhodalidin). The properties of the previously undescribed incomplete methyl ethers of herbacetin and gossypetin obtained during the structural analysis of the glycosides have been studied. It has been found that diazomethane methylates the 5-OH groups in the diglycosides investigated.
Keywords
Glycoside Rhamnose Methyl Ether Epigeal Part Flavonol GlycosidePreview
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