Table 2. Dose-dependent inhibitory effects of 4-OH-TAM on MCF-7 cell growth.

Group	Treatment	% of inhibition
1	Control (NC)	0
2	1×10-7	9.9
3	3.33 × 10-7	12.5
4	1×10-6	5.4
5	3.33 × 10-6	16.4
6	1×10-5	13.8
7	3.33 × 10-5	63.4
8	1×10-4	63.4
9	3.33 × 10-4	94.4
10	1×10-3	91.7
11	3.33×10-3	85.5

The cells in each group were treated with 4-OH-TAM at the indicated concentrations for 72 h. The cell viability in each group was determined by CCK8 assay with commercial CCK8 kit.