ATR-IN-4 is a potent ATR (Ataxia telangiectasia mutated gene Rad 3-associated kinase) inhibitor. ATR-IN-4 inhibits growth of human prostate cancer cells DU145 and human lung cancer cells NCI-H460 with IC50s of 130.9 nM and 41 .33 nM, respectively. (Patent CN112142744A, compound 13).
