A compound suitable for treating EGFR-dependent non-small cell lung cancer exceptionally inhibits activity of the EGFR kinase, in particular in EGFR-dependent non-small cell lung cancer with intrinsic or acquired resistance against at least one EGFR inhibitor. Methods for inhibiting EGFR kinase activity in non-small cell lung cancer cells which harbor an abnormality in the EGFR gene and for targeting cancer cells harboring an abnormality in EGFR gene by contacting EGFR-dependent non-small cell lung cancer cells with said compound are also provided. The compounds allow for an advantageous inhibition of the EGFR kinase activity and induction of apoptosis of the non-small cell lung cancer cells with abnormality in the EGFR gene. Hence, said compounds represent a highly promising treatment option for patients harboring EGFR-dependent cancer.
