Used as a key chiral building block in the synthesis of pharmaceuticals, particularly in the development of enzyme inhibitors and neuroactive agents. Its rigid, polycyclic structure and defined stereochemistry make it valuable for designing drugs targeting central nervous system disorders. It is often incorporated into molecules to enhance metabolic stability and binding selectivity. Commonly utilized in medicinal chemistry for structure-activity relationship (SAR) studies due to its ability to constrain peptide-like structures in bioactive conformations.