Table 1.

Percent growth inhibition obtained with the K562 cell line with compounds at 10 μM and IC₅₀ values (μM) with the same cells.

Com.	% inhibition	IC50 (μM)
4	14.2	>10
12a	65.4	5.5
12b	64.0	2.5
12c	62.4	5.0
12d	58.0	7.4
12e	28.2	>10
12f	31.0	>10
12g	49.0	10
12h	27.0	>10
12i	52.2	9.5
12j	37.8	>10
12k	64.0	6.3
12l	59.0	8.1
12m	25.5	>10
12n	22.0	>10
12o	46.2	>10
12p	45.9	>10
12q	43.2	>10
12r	43.8	>10
12s	45.9	>10
17t	74.5	0.57
17u	74.1	1.2
17v	26.3	>10
18	63.6	0.02