Used in the synthesis of complex molecules, particularly in the field of bioconjugation and drug delivery systems. It serves as a versatile linker or spacer in the development of peptide-based therapeutics, enabling the attachment of functional groups or targeting moieties. Its structure, featuring Boc protection and PEG chains, enhances solubility and stability, making it suitable for modifying biomolecules. It is also employed in the creation of antibody-drug conjugates (ADCs) and other targeted therapies, where precise control over molecular spacing and compatibility with biological systems is crucial. Additionally, it finds applications in material science for surface modification and the development of biocompatible coatings.