Used in bioconjugation and pharmaceutical research, this compound is a key reagent for attaching functional groups to biomolecules. Its Boc-protected aminooxy group allows for selective conjugation with aldehydes and ketones, making it valuable in the development of antibody-drug conjugates (ADCs) and other therapeutic agents. The PEG3 spacer enhances solubility and reduces steric hindrance, improving the efficiency of the conjugation process. It is also employed in the synthesis of prodrugs and targeted drug delivery systems, where controlled release and specificity are critical. Additionally, it finds use in material science for surface modification and functionalization of polymers and nanoparticles.