Used primarily in research settings as a potent and selective antagonist for dopamine D4 receptors. Its ability to bind selectively to the D4 receptor subtype makes it a valuable tool for studying dopaminergic pathways in the brain, particularly those involved in cognitive function, mood regulation, and reward mechanisms. It has been employed in neuropharmacological studies to help elucidate the role of D4 receptors in conditions such as schizophrenia, attention deficit hyperactivity disorder (ADHD), and drug addiction. Due to its high selectivity, it helps minimize off-target effects in experimental models, allowing for more accurate interpretation of D4 receptor-related responses. Not used clinically; strictly for laboratory and investigative purposes.