Used as a key intermediate in the synthesis of quinolone antibiotics, particularly fluoroquinolones, which are broad-spectrum antibacterial agents. Its structure allows for functional modifications at the 3-carboxylate and 4-oxo positions, enabling the development of compounds with enhanced antimicrobial activity and pharmacokinetic properties. Commonly employed in medicinal chemistry research for designing new antimicrobial agents and kinase inhibitors. Also utilized in the preparation of fluorescent probes and heterocyclic compounds for pharmaceutical and agrochemical applications.