Current standard of care treatment for non-small-cell lung cancer (NSCLC) tumors harboring mutations of the epidermal growth factor receptor (EGFR) gene includes a wide variety of tyrosine kinase inhibitors (TKIs). There are, however, some types of NSCLC tumors, such as the ones with EGFR exon 20 insertion mutations, that have a much-limited margin of therapeutic intervention. Researchers from Suzhou Puhe Pharmaceutical Technology Co. Ltd. have reported the identification and early evaluation of a small-molecule third-generation TKI of EGFR, YK-029A, being developed as an anticancer agent.