Used as a key chiral building block in pharmaceutical synthesis, particularly in the development of biologically active compounds. Its rigid pyrrolidine structure and electron-withdrawing trifluoromethyl groups enhance metabolic stability and binding selectivity, making it valuable in designing protease inhibitors and CNS-targeted drugs. Commonly employed in asymmetric synthesis to introduce stereochemical control. Also utilized in agrochemicals for improving compound durability and target specificity. The hydrochloride salt form improves solubility and handling in aqueous reaction systems.