Used in bioconjugation and chemical biology, it serves as a linker for attaching biomolecules like proteins, peptides, or antibodies to other entities such as drugs, dyes, or nanoparticles. The T-Boc group provides protection for the aminooxy functionality during synthesis, ensuring selective reactivity when needed. The PEG3 spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation. The bromide group allows for further functionalization, enabling the creation of complex molecular architectures. Commonly applied in drug delivery systems, diagnostic probes, and targeted therapies, it facilitates precise and controlled modifications of biomolecules for research and therapeutic purposes.