Table 2.

Cytotoxicity (IC₅₀ μg/mL) of compounds 1–5 ^a.

	Cell Lines
	DLD-1	T-47D	HCT-116	MCF-7	MDA-MB-231	K562	Molt 4
1	12.9	12.0	6.3	11.5	11.4	4.3	6.3
2	– c	– c	– c	– c	– c	13.7	17.8
Doxorubicin b	0.42	0.28	0.89	2.2	1.3	0.14	0.009

^a Compounds 3–5 was inactive against all seven cell lines (IC₅₀ > 20 μg/mL); ^b Clinical anticancer drug used as a positive control; ^c NA, not active at 20 μg/mL.