Used in pharmaceutical research as a key structural motif in the development of central nervous system (CNS) agents. Its spirocyclic framework provides three-dimensional complexity and rigidity, which can enhance selectivity and metabolic stability in drug candidates. Commonly explored in the design of serotonin and dopamine receptor modulators for treating neurological disorders such as depression, schizophrenia, and Parkinson’s disease. Also serves as a building block in synthetic chemistry for creating novel heterocyclic compounds with potential biological activity.