Used as a key intermediate in the synthesis of peptide-based pharmaceuticals and bioconjugates. Its carboxylic acid and imine functional groups allow for selective coupling reactions, making it valuable in solid-phase peptide synthesis and the development of targeted drug delivery systems. Commonly employed in the preparation of linkers for antibody-drug conjugates (ADCs), where controlled stability and reactivity are essential. Also utilized in biochemical research for labeling and crosslinking biomolecules due to its ability to form stable amide bonds under mild conditions.