Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its rigid, fused ring structure provides stereochemical control in drug design, making it valuable in creating compounds with high selectivity and potency. Commonly found in research related to central nervous system agents and antiviral drugs. Also employed in the preparation of peptidomimetics due to its ability to mimic amino acid geometry while enhancing metabolic stability.