Figure 4.

Effects of 1–5 on cell proliferation. HepG2 cells were treated with 1–5 at various concentrations for 24 h (A), and with 1–5 (100 µM) for the times indicated (B), and cell proliferation was determined using the MTT assay. ETP was used as a positive control for inducing apoptotic death of HepG2 cells. The data are presented as the mean ± S.D. of three individual experiments. (A); * p < 0.05 compared with the non-treated cells (concentration 0 μM). (B); * p < 0.05 compared with the non-treated cells (control) at 24- or 48-h incubation.