FAUC 346 is primarily used in research settings as a selective agonist for dopamine D3 receptors. It plays a key role in studying dopaminergic pathways in the brain, particularly in relation to neurological and psychiatric disorders such as Parkinson’s disease, schizophrenia, and drug addiction. Due to its high selectivity for D3 receptors over D2, it helps scientists differentiate receptor-specific effects, making it a valuable tool in neuropharmacology. It is also used in behavioral studies to assess the impact of dopamine activation on motor function and reward mechanisms. Its application remains confined to preclinical research, with no current therapeutic use in humans.