PF-06263276 (PF 6263276) is a potent and selective pan-JAK inhibitor, with IC50s of 2.2 nM, 23.1 nM, 59.9 nM and 29.7 nM for JAK1, JAK2, JAK3 and TYK2, respectively[1]. JAK1|2.2 nM (IC50)|JAK2|23.1 nM (IC50)|JAK3|59.9 nM (IC50)|Tyk2|29.7 nM (IC50)
[1]. Jones P, et al. Design and Synthesis of a Pan-Janus Kinase Inhibitor Clinical Candidate (PF-06263276) Suitable for Inhaled and Topical Delivery for the Treatment of Inflammatory Diseases of the Lungs and Skin. J Med Chem. 2017 Jan 26;60(2):767-786.