EGFR-IN-69 (compound 17g) is a potent EGFR inhibitor, with IC50 values of 4.3, 6.6 and 25.6 nM against EGFR L858R/T790M/C797S, EGFR L858R/T790M, and EGFR 19del/T790M/C797S, respectively. EGFR-IN-69 can be used for non-small-cell-lung-cancer (NSCLC) research.