Used as a key intermediate in the synthesis of tyrosine kinase inhibitors, particularly in the development of anticancer agents. Its structure allows for selective modification at the 6 and 7 positions, enabling the creation of targeted therapies that inhibit epidermal growth factor receptor (EGFR) signaling. Commonly employed in research settings to develop small molecule drugs for treating non-small cell lung cancer and other EGFR-driven tumors. Also utilized in radiolabeling studies due to the presence of iodine, facilitating imaging and biodistribution analysis in preclinical models.