CAS: 2227199-31-5

Applications N-Butyl 3-oxopropanoate Tofacitinib is an impurity of Tofacitinib(T528000) which is 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. References Jiang, J., et. al.: J. med. Chem., 51, 8012 (2008)