Used primarily in pharmaceutical research as a potent and selective antagonist for serotonin receptors, particularly the 5-HT1A subtype. It serves as a valuable tool compound in neuroscience studies to investigate the role of serotonin signaling in mood, anxiety, and cognitive disorders. Due to its ability to cross the blood-brain barrier effectively, it is employed in in vivo models to modulate serotonergic activity and assess behavioral outcomes. Its structural properties also make it a reference molecule in structure-activity relationship (SAR) studies aimed at developing new central nervous system (CNS) therapeutics.