Table 3.

Cytotoxicity ^a activities of compounds 7f and 7g in Vero and MRC-5 cells

Compd	Vero		MRC-5
	CC50 (ug/ml)	SIb	CC50 (ug/ml)	SI
7f	14.72 ± 2.02	7.37	10.18 ± 2.78	5.09
7g	5.15 ± 1.29	10.3	8.78 ± 0.48	17.6

^a: Cytotoxic concentration required to inhibit Vero or MRC-5 cell growth by 50%.

^b: Selectivity index (SI) value equaled to CC₅₀/MIC.