Objective To determine the flavonoid glycosides constituents from the whole plants of Clematis tangutica. Methods Clematis tangutica was extracted with Et OH under reflux, and then extracted with petroleum ether and n-Bu OH. The chemical constituents of n-Bu OH extract were isolated by silica gel, Sephadex LH-20, and semi-preparative HPLC column chromatography. The structures were elucidated by spectral analysis and chemical properties. Results Six flavonoid glycosides were isolated and elucidated as apigen...