Used in pharmaceutical research as a potent and selective antagonist for dopamine D4 receptors, this compound is valuable in studying neurological and psychiatric disorders such as schizophrenia, attention deficit hyperactivity disorder (ADHD), and substance abuse. Its high selectivity allows scientists to isolate D4 receptor activity, helping to understand its role in cognition, emotion, and behavior without significant interference from other dopamine receptor subtypes. It also serves as a lead compound in developing new central nervous system (CNS) therapeutics with improved efficacy and fewer side effects.