Used as an intermediate in peptide synthesis, particularly in the preparation of modified amino acids and bioactive peptides. Its protected amine and carboxylic acid functional groups allow for selective coupling reactions, making it valuable in solid-phase and solution-phase peptide assembly. Commonly employed in the development of enzyme inhibitors and pharmaceutical agents where precise side-chain modifications are required. Also utilized in the synthesis of prodrugs and targeted drug delivery systems due to its biocompatible degradation profile.