Used in bioconjugation and click chemistry applications, this compound serves as a linker for attaching molecules to surfaces or other biomolecules. Its azide group enables efficient reactions with alkynes via copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in drug delivery systems and protein labeling. The Boc and t-butyl ester groups provide temporary protection for amines and carboxylic acids, respectively, allowing selective deprotection during synthesis. Its PEG spacers enhance solubility and reduce steric hindrance, facilitating applications in biopharmaceuticals and materials science.