Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its rigid pyrrolidine structure with defined stereochemistry makes it valuable for designing drugs targeting enzymes and receptors where spatial orientation is critical. Commonly employed in medicinal chemistry for peptidomimetic design, enhancing metabolic stability and selectivity. Also utilized in the preparation of enzyme inhibitors due to its ability to mimic natural amino acids while resisting degradation.