Used as a key intermediate in the synthesis of fluoroquinolone antibiotics, particularly in the development of third-generation quinolones with enhanced antimicrobial activity. Its structure supports broad-spectrum efficacy against Gram-negative and some Gram-positive bacteria. Commonly employed in pharmaceutical research to improve potency, pharmacokinetics, and resistance profiles of new antibacterial agents. Also utilized in structure-activity relationship (SAR) studies to optimize quinolone-based drug candidates.