Used as a chiral building block in the synthesis of biologically active compounds, particularly in pharmaceuticals targeting central nervous system disorders. Its rigid cyclopentane scaffold with defined stereochemistry makes it valuable for developing protease inhibitors and receptor modulators. Commonly employed in the preparation of intermediates for drugs involving GABA analogs or antiviral agents. The hydrochloride salt form enhances stability and solubility, facilitating handling in multi-step organic syntheses.