Used as a key chiral building block in pharmaceutical synthesis, particularly in the development of biologically active compounds. Its rigid cyclobutane scaffold and trifluoromethyl group enhance metabolic stability and binding selectivity, making it valuable in drug design for central nervous system agents and protease inhibitors. The amine functionality allows for easy derivatization, enabling incorporation into larger molecules. Commonly employed in asymmetric synthesis routes where stereochemical control is critical for activity. Its hydrochloride salt form improves stability and handling in solid-state reactions.