Used in pharmaceutical research as a key intermediate in the synthesis of targeted cancer therapies, particularly in the development of antibody-drug conjugates (ADCs). Its structure enables stable linkage to monoclonal antibodies while allowing controlled release of the active drug at the tumor site. Also employed in bioconjugation techniques due to its reactive amine group, facilitating labeling and detection in biological systems. Shows promise in improving drug solubility and stability in aqueous formulations.