The chemical is widely used in bioconjugation and drug delivery systems. It serves as a linker or spacer in the synthesis of peptide-based therapeutics, enabling the attachment of targeting molecules or drugs to enhance their efficacy and specificity. Its acetyl group provides stability, while the PEG4 spacer improves solubility and reduces immunogenicity in biological systems. The NHBoc group allows for controlled deprotection, facilitating precise modifications in complex molecular assemblies. This compound is particularly valuable in the development of antibody-drug conjugates (ADCs) and other targeted therapies, where it helps optimize pharmacokinetics and therapeutic outcomes. Additionally, it is employed in proteomics research for labeling and modifying biomolecules to study their interactions and functions.