Publications by authors named "Guan-shang Cao"
Objective: To study the chemical constituents of water extracted fraction from Oldenlandia diffusa.
Methods: The compounds were isolated and purified by column chromatography on macroporous resin,silica gel,MCI gel,Sephadex LH-20,ODS medium pressure liquid chromatography and RP-semi-preparative HPLC. The structures of compounds were elucidated on the basis of physicochemical and spectral analysis.