CDK4/6-IN-3 is a brain-penetrant CDK4/CDK6 inhibitor (Kis: <0.3 nM and 2.2 nM) used for the treatment of glioblastoma. It inhibits CDK1 with a Ki of 110 nM.
CDK4/6-IN-5 is a highly effective inhibitor of CDK4 and CDK6, with Ki values of 0.2 and 4.4 nM for CDK4/Cyclin D1 and CDK6/Cyclin D3, respectively (WO2019207463A1, example A93).
CDK4/6-IN-7, a highly potent and selective orally active inhibitor of CDK4/6, demonstrates impressive inhibition activity with IC50 values of 1.58 nM and 4.09 nM respectively. This compound is particularly valuable for breast cancer research [1].