MDL 19301 is primarily utilized in research settings as a potent and selective inhibitor of protein kinase C (PKC). It is particularly valuable in studies aimed at understanding the role of PKC in cellular signaling pathways. Researchers employ MDL 19301 to investigate its effects on various biological processes, including cell proliferation, differentiation, and apoptosis. Its inhibitory properties make it a useful tool for dissecting the mechanisms of PKC-mediated responses in cancer, cardiovascular diseases, and neurological disorders. Additionally, MDL 19301 is used in pharmacological studies to explore potential therapeutic applications of PKC inhibition, contributing to the development of targeted treatments for diseases where PKC activity is dysregulated.