WZ3146 is a mutant selective EGFR inhibitor with IC₅₀s of 2, 2, 5, 14 and 66 nM for EGFR^L858R, EGFR^L858R/T790M, EGFR^E746_A750, EGFR^{E746_A750/T790M} and EGFR, respectively. IC50 & Target: IC50: 2 nM (EGFR^L858R), 2 nM (EGFR^L858R/T790M), 5 nM (EGFR^E746_A750), 14 nM (EGFR^{E746_A750/T790M}), 66 nM (EGFR) ^[1] In Vitro: WZ3146 is a novel EGFR inhibitor, suppresses the growth of EGFR T790M containing cell lines and inhibits EGFR phosphorylation^[1].