Flavonoid constituents of Ephedra alata |
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Authors: | Mahmoud AM Nawwar Hassan I El-Sissi Heba H Barakat |
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Institution: | National Research Centre, El-Dokki, Cairo, Egypt |
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Abstract: | 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 spectroscopy. |
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Keywords: | Ephedraceae |
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