Table 1.

Cytotoxic activity of the compounds 2–19 against proliferation of U87MG cells.

Esters		Amides
Compound	IC50 (μg/mL)	Compound	IC50 (μg/mL)
2	85.129 ± 0.78	14	13.196 ± 0.32
3	100.030 ± 1.12	15	33.128 ± 0.41
4	78.393 ± 0.69	16	22.741 ± 0.34
5	57.871 ± 0.71	17	22.654 ± 0.39
6	31.666 ± 0.48	18	43.396 ± 0.48
7	34.926 ± 0.54	19	36.072 ± 0.44
8	50.077 ± 0.62
9	81.433 ± 0.55
10	2.579 ± 0.35
11	26.701 ± 0.47
12	24.786 ± 0.37
13	30.336 ± 0.35

Positive control (paclitaxel): IC₅₀: 2.119 ± 0.35 μg/mL.