Crodonsides A–D, four new guaiane-type sesquiterpenoid glycosides from Croton dongnaiensis and their xanthine oxidase inhibitory activities
Four previously undescribed guaiane-type sesquiterpenoid glycosides, crodonsides A–D (1–4), together with nine known compounds (5–13), were isolated from the branches and leaves of Croton dongnaiensis (Euphorbiaceae). Their structures were elucidated by extensive analysis of HRESIMS, 1D and 2D NMR spectroscopic data, a...