Table 1. EC50 Values (μM) for Host Cells and Intracellular T. cruzi Forms.

Sample	EC50_T. cruzi	EC50_host	S.I.a
BNZ	2.2 ± 0.4	>40	>18
40	2.4 ± 0.4	8.5 ± 1.9	3.5
15	2.4 ± 0.3	7.5 ± 0.6	3.1
39	3.2 ± 1	5.6 ± 1.6	1.8
6	3.5 ± 0.4	8.4 ± 1.8	2.4
32	4.2 ± 0.5	12.3 ± 1.8	2.9
3	6.4 ± 2	13 ± 2	2.0
12	8.5 ± 1.5	14.7 ± 4.2	1.7
13	16.7 ± 4.2	54 ± 3.3	3.2

^aS.I. = selectivity index calculated as EC50_host/EC50_T. cruzi. Mean and standard deviation for 3 independent experiments.