Objective : To isolate and elucidate the constituents from whole plant of Pholidota cantonensis. Methods : The constituents were isolated and purified by silica gel, Sephadex LH-20 and MCI gel chromatography and recrystallization. The structures were elucida- ted on the basis of the chemical evidence and spectroscopic data. Results : Ten compounds were obtained : batatasin Ⅲ ( 1 ), orchinol ( 2 ), ephmeranthoquinone ( 3 ), densiflorol B ( 4 ), 3,5-dimethoxy-4-hydroxy-propiopheuone ( 5 ) , cinnamic acid ( 6 ), syringaresinol ( ...