We further confirmed the superior antiproliferative efficacy of BI-732 in PC9-DC (IC50, 24.9 nM), YU-1182 (IC50, 73 nM) and YU-1097 cells (IC50, 2.9 nM)….Our findings suggest that BI-732 can be effective against EGFR mutant NSCLC, especially EGFRDel19/T790M/C797S and EGFRDel19/C797S, that have progressed with previous EGFR inhibitors.