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.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

1. Jason G. Kettle, et al. AACR Abstract 979: Discovery of the JAK1 selective kinase inhibitor AZD4205. 2. Patent: WO 2017050938 A1 20170330, Example 32.