FQI 1 is primarily utilized in biochemical research as a potent inhibitor of the focal adhesion kinase (FAK) signaling pathway. Its application is significant in studying cellular processes such as cell adhesion, migration, and survival, which are crucial in cancer biology. Researchers employ FQI 1 to investigate the role of FAK in tumor progression and metastasis, providing insights into potential therapeutic targets for cancer treatment. Additionally, it is used in in vitro and in vivo studies to explore the effects of FAK inhibition on various cancer cell lines and animal models, aiding in the development of novel anti-cancer strategies.