CDK4-IN-1-d6 is a deuterium labeled CDK4-IN-1. CDK4-IN-1 (compound 63) is a CDK4 inhibitor (IC50= 10 nM)[1].
Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process[1].
[1]. Cho YS, Borland M, Brain C, et al. 4-(Pyrazol-4-yl)-pyrimidines as selective inhibitors of cyclin-dependent kinase 4/6. J Med Chem. 2010;53(22):7938-7957.
[2]. Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216.