Used as an intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research targeting central nervous system disorders. Exhibits utility in developing receptor agonists and antagonists due to its affinity for neurotransmitter receptors. Commonly employed in medicinal chemistry for structure-activity relationship studies, especially in antipsychotic and antidepressant drug development. Also applied in the preparation of fluorescent probes for biochemical assays owing to its quinoline-based scaffold.