Used as a key intermediate in the synthesis of quinoline-based pharmaceuticals, particularly in antimalarial drugs. It serves as a building block in medicinal chemistry due to its ability to form complex heterocyclic structures. Its amino and carboxylic functional groups allow for easy modification, enabling the development of biologically active compounds. Also applied in the preparation of fluorescent probes and dyes, where its conjugated structure contributes to optical properties useful in imaging and sensor technologies.