Used in pharmaceutical research as a potent and selective antagonist for dopamine D4 receptors. It serves as a key compound in studying neurological disorders such as schizophrenia, attention deficit hyperactivity disorder (ADHD), and other central nervous system (CNS) conditions. Due to its high affinity for the D4 receptor subtype, it helps differentiate D4-mediated effects from other dopamine receptor activities in experimental models. It is also employed in radiolabeled form for receptor binding assays and neuroimaging studies to map receptor distribution in brain tissues. Its application supports the development of targeted therapies with potentially fewer side effects compared to broad-acting antipsychotics.