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.
Nawwar, Mahmoud A. M.,El-Sissi, Hassan I.,Barakat, Heba H.
Get Best Price for83151-90-02-(3,4-dihydroxyphenyl)-5,7-dihydroxy-8-[(2R,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl]-6-[(2S,3R,4S,5S)-3,4,5-trihydroxytetrahydro-2H-pyran-2-yl]-4H-chromen-4-one (non-preferred name)