Objective: To investigate the derivants of bergenin through structural modification and their activity of anti-tumor cells.Methods: Given dry pyridine as the solvent and catalyst, acetylation reactions were undertaken with bergenin and different proportions of acetic anhydride; Given dry DMF as solvent and NaH as catalyst, methylation reactions were undertaken with bergenin and CH3I; In vitro anti-tumor activity of bergenin and its six derivants was measured in human tumor cells line using the upgraded MTT ...