Three new flavonol C-glycosides from Sida cordifolia Linn

Three new flavonol C-glycosides: 3 '-(3 '',7 ''-dimethyl-2 '',6 ''-octadiene)-8-C-P-D-glucosyl-kaempferol 3-O-beta-D-glucoside (1), 3 '-(3 '',7 ''-dimethyl-2 '',6-octadiene)-8-C-beta-D-glucosyl-kaempferol 3-O-beta-D-glucosyl [1-4]-alpha-D-glucoside (2) and 6-(3 ''-methyl-2 ''-butene)-3 '-methoxyl-8-C-beta-D-glucosyl-kaempferol 3-O-beta-D-glucosyl [1 -> 4]-beta-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.