BRL-15572 is primarily utilized in pharmacological research as a selective antagonist for the 5-HT1D serotonin receptor. Its application is significant in studying the role of this receptor subtype in various physiological and pathological processes, including migraine, anxiety, and depression. Researchers employ BRL-15572 to investigate the receptor's function in neurotransmission and its potential as a therapeutic target. Additionally, it is used in experimental models to understand the modulation of serotonin pathways and their impact on behavior and neurological disorders. The compound's specificity makes it a valuable tool for dissecting the complex mechanisms of serotonin receptor interactions in the central nervous system.