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 stereo-selectivity is critical. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies, especially in CNS-related drug discovery and antiviral research. Also utilized in asymmetric synthesis to introduce chirality in complex molecule construction.