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Three New Flavonol C-Glycosides from Sida cordifolia Linn

R.K. Sutradhar^a, A.K.M.M. Rahman^b,* and M.U. Ahmad^c

^aDepartment of Chemistry, Chittagong University of Engineering and Technology (CUET), Chittagong-4349, Bangladesh
^bDepartment of Chemistry, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000,Bangladesh
^cDepartment of Chemistry, Jahangirnagar University, Savar, Dhaka, Bangladesh

Three new flavonol C-glycosides: 3′-(3″,7″-dimethyl-2″,6″-octadiene)-8-C-β-D-glucosyl- kaempferol 3-O-β-D-glucoside (1), 3′-(3″,7″-dimethyl-2″,6″-octadiene)-8-C-β-D- glucosyl-kaempferol 3-O-β-D-glucosyl [1→4]-α-D-glucoside (2) and 6-(3″-methyl-2″-butene)-3′-methoxyl-8-C-β-D-glucosyl-kaempferol 3-O-β-D-glucosyl [1→4]-β-D-glucoside (3) have been isolated from 80% ethanolic extract of the aerial parts of Sida cordifolia Linn followed by partitioning with ethyl acetate. Structures were established by chemical and spectroscopic methods.

Keywords: Flavonol C-glycosides, Sida cordifolia Linn, Extracts, Characterization