ATR-IN-9 is a potent inhibitor of Ataxia-telangiectasia and RAD-3-related protein kinase (ATR) extracted from patent WO2020087170A1, compound 59, has an IC50 of 10 nM[1].
References
[1] Crane SN, et, al. Compounds, pharmaceutical compositions, and methods of preparing compounds and of their use as atr kinase inhibitors. WO2020087170A1.