Table 1.

The in vitro inhibition activity of compound 1-6 against three cell lines.

Sample	IC50 (µM)
	K562	B16	CHO
5-Fu	0.27	0.23	0.35
1	16.83	12.15	12.86
2	43.25	36.93	>50
3	>50	3.72	32.30
4	30.46	4.44	16.83
5	>50	3.97	7.41
6	14.48	7.35	6.86