Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of bioactive molecules targeting central nervous system disorders. Its spirocyclic structure and protected amine group make it valuable for constructing complex heterocycles in medicinal chemistry. The carboxylic acid functionality allows for peptide coupling or esterification, enabling attachment to other molecular fragments. Commonly employed in research settings for designing novel drug candidates, especially those requiring conformational rigidity and improved metabolic stability.