CDK4/6-IN-6 (example A94) is a potent CDK4/CDK6 inhibitor with a Ki of 0.6 nM and 13.9 nM for CDK4/Cyclin D1 and CDK6/Cyclin D3, respectively[1].
CDK4/6-IN-6 (example A94) has IC50s of 38.5 nM and 144.9 nM for CDK4/Cyclin D1 and CDK6/Cyclin D3 using phospho-Rb S795 ELISA assays in JEKO-1 and MV4-1 1 cells[1].
[1]. Ping Chen, et al. 2-amino-pyridine or 2-amino-pyrimidine derivatives as cyclin dependent kinase inhibitors. WO2019207463A1.