Used in advanced pharmaceutical research as a key intermediate in the synthesis of selective kinase inhibitors. It plays a role in developing treatments for certain cancers due to its ability to modulate signaling pathways involved in cell proliferation. Its structure allows for strong binding to specific enzyme targets, enhancing drug efficacy. Also employed in the design of fluorescent probes for cellular imaging, leveraging its quinoline and isoquinoline moieties for optical properties. Limited use outside research settings due to its specialized function and complexity.