Used primarily in scientific research as a selective antagonist for dopamine D4 receptors. It helps investigate the role of D4 receptors in neurological and psychiatric conditions such as schizophrenia, attention deficit hyperactivity disorder (ADHD), and substance abuse. Due to its high selectivity, it allows researchers to isolate D4 receptor activity from other dopamine receptor subtypes, making it a valuable tool in neuropharmacology studies. Not intended for clinical or therapeutic use in humans.