Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of neuroactive compounds and antiviral agents. Its rigid bicyclic structure makes it valuable for designing enzyme inhibitors and receptor modulators. The hemioxalate salt form enhances stability and crystallinity, facilitating handling and purification during drug manufacturing. Commonly employed in medicinal chemistry for structure-activity relationship studies due to its ability to mimic peptide bonds and influence bioavailability.