In August 2020, the article 'Discovery of Tyrosine Kinase 2 (TYK2) Inhibitor (PF-06826647) for the Treatment of Autoimmune Diseases' (https://bit.ly/2SGbPxi) describing the discovery of an ATP-competitive pyrazolopyrazinyl series of TYK2 inhibitors was published. Lead optimization of the set of compounds through structure-based design, led to the identification of the clinical candidate PF-06826647, which binds to the catalytically active JH1 kinase domain. Now this drug candidate is in clinical development (Ph.II) for the treatment of some autoimmune diseases. PF-06826647 contains cyclobutane dinitrile moiety in its backbone.

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