Compound

IC₅₀ CDK2 ± SD (μM)^*

2

4.6 ± 1.80

3

4.7 ± 1.00

4

4.8 ± 1.70

5

6.2 ± 1.20

6

6.4 ± 1.97

7

4.5 ± 1.20

9a

6.8 ± 1.70

11

4.7 ± 1.90

12

4 ± 1.40

Olomoucine

5.0 ± 1.0