Table 2.

In vitro VEGFR-2 kinase inhibitory activities of compounds 5b,10e, 10g, 15a and 17a.

Code	IC50 (μM) a
5b	0.160 ± 0.008
10e	0.358 ± 0.019
10g	0.087 ± 0.004
15a	0.180 ± 0.009
17a	0.078 ± 0.003
Sunitinib	0.139 ± 0.007

^a All IC₅₀ values are calculated as the mean ± SD of three different experiments.