Table 2.

Antimalarial activity of compounds 1–6 against P. Falciparum.

Compounda	activity	IC50 (M)
1–2, 5	Inactive	> 10-5
3–4	Good	10-7 to < 10-6
6	Fair	10-6 to < 10-5

^a Chloroquine hydrochloride was used as the reference drug.