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A benzoquinone and flavonoids from Cyperus alopecuroides
Mahmoud I Nassar1, Ayman F Abdel-Razik, Ezz El-Din A M El-Khrisy
1Chemistry of Natural and Microbial Products Department, National Research Centre, Dokki, Cairo, Egypt. mnasser_eg@yahoo.com
Phytochemistry
|May 29, 2002
Abstract:
A benzoquinone, named alopecuquinone, was isolated from the ethanol extract of the inflorescences of Cyperus alopecuroides. Its structure was primarily elucidated by spectroscopic analysis including 1H, 13C NMR, APT, HMQC, 1H-1H COSY and CIMS. The known flavonoids, vicenin 2, orientin, diosmetin, quercetin 3,3'-dimethyl ether and its 3,4'-dimethyl ether, were also isolated and characterized. The ethanol extract of the plant material showed moderate estrogenic activity using a strain of Saccharomyces cerevisiae.