Figure 4.

Cell viability of 3T3-L1 cell on treatment with poncirin, naringin, auraptene, β-sitosterol, imperatorin, phellopterin and oxypeucedanin isolated from Ponciri Fructus. Each set of data represents mean of triplicate experiment ± standard deviation. Significant difference between the groups was calculated using two-tailed Student’s t-test. * p ˂ 0.05 vs. control, ** p ˂ 0.01 vs. control are used to represent significant difference in toxicity of the extract sample compared to non-treated control group.