Table 1. Cytotoxicity of OEL in cancer cells (U87, A172, U251, and Saos-2) and normal cells lines (HL7702, H9C2, and 3T3). The effects of OEL on cancer cells and normal cells were examined by MTT assay. The cells were treated with various concentrations of OEL for 48 h. The IC₅₀ values of OEL were then calculated. Data are expressed as the mean±SD of three independent experiments.

Cell lines	IC50 (μmol/L) for 48 h
U87	29.50
A172	7.2
U251	31.90
Saos-2	34.62
HL7702	45.89
H9C2	75.31
3T3	73.02

The effects of OEL on cancer cells and normal cells lines. The cells were treated with various concentrations of OEL for 48 h and examined by MTT method. The IC₅₀ values of OEL were then calculated. Data from three independent experiments.