Used in bioconjugation and drug delivery systems, it serves as a linker molecule to attach therapeutic agents or targeting moieties to biomolecules. Its tert-butyl ester group provides stability during synthesis, while the amine group allows for further functionalization. Commonly applied in the development of PEGylated drugs, it enhances solubility, reduces immunogenicity, and prolongs circulation time in the body. Also utilized in the creation of hydrogels and nanoparticles for controlled release applications in medical and pharmaceutical research.