Used as an intermediate in the synthesis of targeted cancer therapies, particularly in the development of tyrosine kinase inhibitors. It plays a role in blocking signaling pathways that promote tumor growth, especially in cancers involving epidermal growth factor receptor (EGFR) mutations. Its structure supports high selectivity and potency in inhibiting abnormal kinase activity, making it valuable in oncology drug research and the production of active pharmaceutical ingredients for lung and other epithelial cancers.