BI-D1870 is primarily utilized in biochemical research as a potent and selective inhibitor of ribosomal S6 kinase (RSK). It is extensively employed in studies aimed at understanding the role of RSK in cellular signaling pathways, particularly those involving cell proliferation, survival, and motility. Researchers use BI-D1870 to investigate its effects on cancer cell lines, as RSK is often implicated in tumor growth and metastasis. Additionally, it serves as a valuable tool in exploring potential therapeutic strategies for diseases where RSK activity is dysregulated, such as certain types of cancer and inflammatory conditions. Its application in these studies helps elucidate the molecular mechanisms underlying these processes and aids in the development of targeted therapies.