Used in bioconjugation and chemical biology, it serves as a linker for attaching molecules to proteins or other biomolecules. The azide group allows for click chemistry reactions, enabling efficient and selective coupling. The Boc (tert-butoxycarbonyl) group provides protection for amines during synthesis. It is particularly useful in drug delivery systems, where it helps create targeted and controlled release mechanisms. Additionally, it is employed in the development of bioconjugates for diagnostic and therapeutic applications, such as antibody-drug conjugates (ADCs). Its PEG (polyethylene glycol) spacer enhances solubility and reduces immunogenicity.