Fig. 1. Dose and time-dependent antitumor effect of oleanolic acid.
HepG2 cells were exposed to compound (0~100 µM). Cell proliferation was determined by MTT assay (A) and morphology (B) were observed. (D) Smc7721 cells were exposed to compound (0~100 µm. Cell proliferation was determined by MTT assay. Each column represents the mean of the data from three inde pendent experiments.