FLAVONOID CONSTITUENTS OF EPHEDRA ALATA

Article abstract of DOI:10.1016/0031-9422(84)83045-9

Two new flavonol glucosides have been identified in Ephedra alata, namely, herbacetin 8-methyl ether 3-O-glucoside-7-O-rutinoside and herbacetin 7-O-(6''-quinylglucoside).The known flavonoids vicenin II, lucenin III, kaempferol 3-rhamnoside, quercetin 3-rhamnoside and herbacetin 7-glucoside were also found.The structure of the isolated compounds was determined mostly by FABMS and 1H NMR spectroscopy.The final structure of the new compounds and of herbacetin 7-glucoside was confirmed by 13C NMR soectroscopy. Key Word Index - Ephedra alata; Ephedraceae; herbacetin 8-methyl ether 3-O-glucoside-7-O-rutinoside; herbacetin 7-O-(6''-quinyl glucoside); flavonol O-glycosides and C-glycosylflavones.