AZD 4205

AZD 4205 (AZD4205) is a potent, selective JAK1 inhibitor IC50 of 73 nM and Ki of 2.8 nM, shows high selectivity against JAK2 and JAK3 with IC50 of 13,233 nM and > 30,000 nM respectively; shows potent inhibition of p-STAT3 in a cell based assay of JAK1 activity with an IC50 of 128 nM and excellent selectivity across the kinome; reduces residual disease and prolongs the benefit of Osimertinib in lung cancer patients with EGFR activating mutations both in vitro and in vivo.