TABLE 2.

Selective toxicity indices of lead compounds

Compound	Selective toxicity index (% toxicity)
	IB3-1	A549	DU145	HeLa
HHQ	26–50	51–75	26–50	76–100
PQS	0–25	26–50	0–25	0–25
1	0–25	0–25	0–25	0–25
2	26–50	76–100	76–100	76–100
4	0–25	76–100	26–50	76–100
6	26–50	51–75	0–25	76–100
9	0–25	26–50	0–25	26–50
12	26–50	51–75	26–50	76–100