Table 3.

IC50 values and tumor specificity index.

Compounds	IC50 (µM)				Tumor specificity index
	HeLa*	HT29*	C6*	Vero*	HeLa	HT29	C6
2	3.64 ± 0.42	0.87 ± 0.09	0.95 ± 0.09	2.81 ± 0.32	0.77	3.23	2.96
3	3.19 ± 0.37	2.37 ± 0.32	3.34 ± 0.34	3.06 ± 0.35	0.96	1.29	0.92
4	0.61 ± 0.09	0.48 ± 0.08	0.60 ± 0.09	0.63 ± 0.09	1.03	1.31	1.05
5FU	275.68 ± 17	258.46 ± 21	217.48 ± 19	258.46 ± 21	0.94	1.00	1.19
Cisplatin	230.41 ± 15	152.57 ± 14	207.51 ± 23	234.83 ± 19	1.02	1.54	1.13
[Ag(CN)2]¯	5.13 ± 0.87	5.18 ± 0.93	5.08 ± 0.89	5.63 ± 0.96	1.10	1.09	1.11

*Values are given as the mean ± SD of three experiments and r² = 0.91 to 0.98. Significant at P < 0.05.