Used in bioconjugation and drug delivery systems, it serves as a linker molecule to attach bioactive molecules or drugs to carriers like peptides, proteins, or nanoparticles. Its PEG (polyethylene glycol) chains enhance solubility and stability, while the Boc (tert-butyloxycarbonyl) group protects amines during synthesis. Commonly applied in targeted cancer therapies, it helps deliver drugs specifically to tumor cells, minimizing side effects. It is also utilized in proteomics for labeling and modifying biomolecules to study their interactions and functions.