Table 3. Cellular Activitya.

| PI3Kβ IC50 (μM) | MDA-MB-468 (μM) |
||||
|---|---|---|---|---|---|
| no. | R1 | R2 | pAKT EC50 | proliferation gIC50 | |
| 18 | 2-Me,3-CF3 | Me | 0.0006 | 0.024 | 0.103 |
| 19 | 2-Me,3-Cl | Me | 0.0005 | 0.019 | 0.032 |
| 20 | 2-Me,3-CF3 | Et | 0.0005 | 0.016 | 0.023 |
| 21 | 2-Me,3-CF3 | c-Pr | 0.0005 | 0.009 | 0.043 |
| 26 | 2-Me,3-Cl | CH2OH | 0.0001 | 0.006 | 0.008 |
| 28 | 2-Me,3-Cl | OMe | 0.0003 | 0.006 | 0.021 |
| 32 | 2-Me,3-Cl | NH2 | 0.0002 | 0.003 | 0.026 |
IC50 values given are means of at least two experiments