EGFR-IN-11 is a fourth-generation EGFR-tyrosine kinase inhibitor (EGFR-TKI) with an IC50 of 18 nM for triple mutant EGFR L858R/T790M/C797S. EGFR-IN-11 significantly suppresses the EGFR phosphorylation, induce the apoptosis, and arrest cell cycle at G0/G1.