Objective To separate the saponins from the roots and rhizomes of Caulophyllum robustum and determine their chemical structures.Methods The chemical constituents were isolated by repeated silica gel chromatography,medium pressure column chromatography,and semi-preparative liquid chromatography.Their structures were elucidated by the data of NMR and MS.Results Ten compounds were isolated from the roots and rhizomes of C.robustum and the structures of compounds 1—10 were identified as echinocystic acid-3-O-β-...