WAY-640879 is primarily used in scientific research to study neurological pathways, particularly those involving serotonin receptors. It functions as a selective agonist, making it valuable in investigating mood regulation, anxiety, and depression-related mechanisms in preclinical models. Due to its specificity, it helps researchers differentiate receptor subtype activity, aiding in the development of targeted psychoactive drugs. It is not used clinically but serves as a tool compound in neuropharmacology studies to validate therapeutic targets and assess behavioral responses in animal models.