Cytotoxic activity against MCF-7 and HepG2 cancer cell lines and a normal cell line^a.

Compound	IC50 (μM)
	MCF-7	HepG2	GMSC
2	9.43	22.78	ND
3	ND	>50	ND
5	>50	>50	>50
6	29.51	ND	>50
8	16.99	ND	ND
9	>50	ND	ND
10	12.4	36.67	>50
11	9.07	18.76	>50
12	4.25	12.75	>50
13	5.35	ND	>50
5-FU	6.98	ND	>50

^aND = not determined.