Cytotoxic activities in vitro of compounds 4a, b, 11a, e, 12b, c, 15a measured on tumor cell cultures (Jurkat, K562, U937, Fibroblasts) (μM).

C-d	Jurkat (IC50, μM)	K562 (IC50, μM)	U937 (IC50, μM)	Fibroblasts (IC50, μM)
11e	13.51 ± 0.72	12.38 ± 0.67	16.44 ± 1.43	127.63 ± 2.59
11a	63.29 ± 2.25	45.13 ± 1.36	42.19 ± 1.24	231.42 ± 3.88
12c	17.39 ± 1.87	12.35 ± 1.18	11.49 ± 0.84	145.19 ± 3.47
14g	272.57 ± 5.68	45.87 ± 1.73	40.87 ± 1.58	368.68 ± 4.53
12b	15.48 ± 0.31	15.09 ± 0.18	14.83 ± 0.24	129.42 ± 2.37
15a	118.23 ± 2.74	61.34 ± 2.08	59.17 ± 1.79	389.23 ± 4.69
4b	52.91 ± 1.41	28.37 ± 1.34	26.45 ± 1.17	249.37 ± 3.91
4a	>500	106.24 ± 3.95	141.28 ± 4.33	>500