Used as a key intermediate in the synthesis of peptide-based pharmaceuticals, particularly in the development of targeted drug delivery systems. Its functional groups allow for selective conjugation with biomolecules, making it valuable in creating stable, biocompatible linkers for antibody-drug conjugates (ADCs). Commonly employed in solid-phase peptide synthesis due to its protected carboxylic acid and amine-reactive sites, enabling stepwise assembly of complex peptides with high purity. Also utilized in the preparation of chelating agents for diagnostic imaging agents, where controlled solubility and stability in physiological conditions are required.