Used as an intermediate in pharmaceutical synthesis, particularly in the development of protease inhibitors and other bioactive molecules. Its rigid bicyclic structure enhances selectivity and stability in drug candidates. The cyanide group allows further functionalization, enabling coupling reactions to build complex organic frameworks. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to mimic peptide bonds and improve metabolic resistance. Also utilized in the preparation of enzyme inhibitors where steric constraint is beneficial for target binding.