Used in pharmaceutical research as a potent and selective antagonist for dopamine D4 receptors, this compound is investigated for its potential in treating neurological and psychiatric disorders such as schizophrenia, attention deficit hyperactivity disorder (ADHD), and substance abuse. Its structure allows for high blood-brain barrier penetration, making it effective in central nervous system targeting. It has also served as a lead compound in structure-activity relationship (SAR) studies to develop improved analogs with enhanced selectivity and reduced side effects.