Abstract
Four flavonol rhamnosides were isolated from Rhamnus disperma roots and identified on the basis of their spectroscopic data as rhamnocitrin 3-O-alpha-L-rhamnopyranoside [1], quercetin 7-O-alpha-L-rhamnopyranoside [2], Kampferol 3, 7-di-O-alpha-L-rhamnopyranoside [3] and quercetin 3,4'-di-O-alpha-L-rhamnopyranoside [4]. Occurrence of compounds 1-3 in Rhamnus disperma was reported here for the first time. All compounds [1-4] showed good antioxidant activity against DPPH radical with IC50 values 12.85, 6.82, 12.01 and 11.89 mu g/ml, respectively.