N-((3R,4R)-1,4-diMethylpiperidin-3-yl)-N-Methyl-7H-pyrrolo[2,3-d]pyriMidin-4-aMine

N-((3R,4R)-1,4-Dimethylpiperidin-3-yl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine is an impurity of Tofacitinib (T528000), an enantiopure stereoisomer of the drug, Janus kinase 3(Jak3) inhibitor (CP-690,550) that has been found to inhibit selected members of the STE7 and STE20 subfamily of kinases.