Table 1.

IC₅₀ values of cisplatin (CS), artemisinin (ART), and oleanolic acid (OA) as applied to the human ovarian cancer cell lines, A2780 A2780^cisR, and A2780^ZD0473R cell lines based on, at least, triplicate measurements, with the period of incubation being 72 h.

IC50 (μM) and RF Values
Drug	A2780	A2780cisR	*RF	A2780ZD0473R	RF
CS	0.66 ± 0.08	6.44 ± 0.11	9.75.63	8.37± 0.06	12.6
ART	16.78 ± 0.06	26.8 ± 0.13	1.60	36.36 ± 0.09	2.16
OA	34.0 ± 0.31	26.15 ± 0.28	0.76	10.85 ± 0.05	0.3

*RF: resistant factors.