Used as a key intermediate in the synthesis of quinolone-based pharmaceuticals, particularly in the development of antibacterial and antiviral agents. Its structure supports the formation of compounds with significant biological activity, making it valuable in medicinal chemistry research. Also employed in the design of kinase inhibitors and other targeted therapies in oncology. Additionally, it serves as a building block in the preparation of fluorescent dyes and optical brighteners due to its conjugated aromatic system.