Used in peptide synthesis and pharmaceutical research as a protected intermediate for developing complex bioactive peptides. Its functional groups allow stepwise assembly of peptide chains, particularly in solid-phase synthesis. The trifluoroacetate salt form enhances solubility and stability during purification and coupling steps. Commonly applied in the production of therapeutic peptides with targeted biological activity, including hormone analogs and enzyme inhibitors. Also utilized in the study of structure-activity relationships due to its chiral centers and modular side chains.