Used as a key intermediate in peptide synthesis, particularly in the preparation of complex biomolecules and pharmaceuticals. Its protected amine and ester functionalities allow selective coupling reactions, making it valuable in solid-phase and solution-phase peptide assembly. Commonly employed in the development of peptide-based drugs, diagnostics, and bioconjugates where controlled reactivity and solubility are required. Also utilized in the synthesis of labeled peptides for research in proteomics and molecular biology.