Table 1. The cytotoxicity effect of SKLB-163 on tumor cells.

Tumor cell line	Cell type	IC50 (μM) (mean±S.D.)
A375	Human melanoma cell line	1.82±0.25
SPC-A1	Human lung adenocarcinoma cell line	3.89±0.64
SW620	Human colorectal cancer cell line	5.12±0.98
Hela	Human cervical cancer cell line	5.13±1.09
PC-3	Human prostate cancer cell line	6.58±1.05

Each cell line was treated with various concentrations (0–20 μM) of SKLB-163 for 48 h, respectively. Cell viability was detected by MTT assay. Data are expressed as the mean±S.D. from three experiments