Used in organic synthesis as an intermediate for pharmaceuticals and bioactive compounds. The quinoline ring system enhances its utility in developing antimicrobial, antiviral, and anticancer agents. Commonly employed in the preparation of functionalized heterocycles for medicinal chemistry research. Also serves as a building block in the synthesis of fluorescent dyes and optical materials due to the inherent photophysical properties of the quinoline moiety. Its ester group allows for easy modification, enabling diverse derivatization for structure-activity relationship studies.