Used in research as a potent and selective antagonist for dopamine D4 receptors. Plays a role in studying neurological pathways related to schizophrenia, attention deficit hyperactivity disorder (ADHD), and substance abuse. Due to its high selectivity, it helps differentiate D4 receptor activity from other dopamine receptor subtypes in vitro and in vivo. Also employed in positron emission tomography (PET) studies when labeled with radioactive isotopes to visualize D4 receptor distribution in the brain. Shows potential as a pharmacological tool for exploring cognitive function, mood regulation, and reward mechanisms.