Flavonoid glycosides and hydroxycinnamic acid esters of blackcurrants (Ribes nigrum). Phenolics of fruits 9.
The major flavonol glycosides of ripe blackcurrants (Ribes nigrum cv. Silvergieters Schwarze), myricetin 3-beta-D-glucopyranoside, rutin, and isoquercitrin, have been isolated in crystalline form. Analysis by thin-layer chromatography confirmed the occurrence of the 3-rutinosides and 3-glucosides of cyanidin and delphinidin. No free flavonoid aglycones could, however, be detected in the fresh berries. The major constituent fluorescing blue under ultraviolet light on paper and cellulose thin-layer chromatograms, was isolated and characterized as 1-O-caffeyl-beta-D-glucopyranose. Also isolated were 1-O-ferulyl- and 1-O-p-coumaryl-beta-D-glucopyranose. The occurrence fo hydroxycinnamyl-D-glucoses in blackcurrants does not appear to have been recognized previously.
D002855:Chromatography, Thin Layer; D002934:Cinnamates / Q000032:analysis*; D003373:Coumaric Acids / Q000032:analysis*; D005419:Flavonoids / Q000032:analysis*; D005638:Fruit / Q000032:analysis*; D005960:Glucosides / Q000032:analysis*; D006027:Glycosides / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D010636:Phenols / Q000032:analysis*; D013053:Spectrophotometry
D002934:Cinnamates; D003373:Coumaric Acids; D005419:Flavonoids; D005960:Glucosides; D006027:Glycosides; D010636:Phenols