Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research targeting kinase inhibitors. Its structure supports the development of anticancer agents due to its ability to interact with specific enzyme targets involved in cell proliferation. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies, especially in optimizing pyridopyrimidine-based drug candidates. Also utilized in the preparation of fluorescent probes and labeled compounds for biochemical assays.