This compound is widely used in bioconjugation and click chemistry applications due to its unique functional groups. The Boc group serves as a protective group for the aminooxy functionality, allowing selective deprotection when needed. The aminooxy group enables efficient conjugation with aldehydes or ketones, forming stable oxime bonds. The PEG4 spacer enhances solubility and provides flexibility, reducing steric hindrance in reactions. The azide group facilitates click chemistry, particularly in copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions, enabling the formation of triazole linkages with alkynes. This makes it valuable in drug delivery systems, protein labeling, and the development of biomaterials. Its multifunctional nature allows for the creation of complex molecular architectures in fields like biopharmaceuticals, diagnostics, and materials science.