Table 1.

The cytotoxicity of selected natural products in U2OS cells

Compounds	IC50
Vinblastine	0.10 ± 0.05 nM
Homoharringtonine	3.00 ± 1.67 nM
Colchicine	10.67 ± 10.18 nM
Podophyllotoxin	33.6 ± 4.31 nM
Paclitaxel	0.23 ± 0.10 μM
Doxorubicin	0.69 ± 0.26 μM
Sanguinarine	0.92 ± 0.53 μM
Chelerythrine	2.88 ± 0.76 μM
Chelidonine	3.86 ± 1.99 μM

Data are presented as the mean ± standard deviation (SD).