Used in the synthesis of complex molecules, particularly in the field of pharmaceuticals and bioconjugation. It serves as a linker or spacer in drug delivery systems, enabling the controlled release of therapeutic agents. The Boc group provides protection during chemical reactions, while the PEG (polyethylene glycol) segment enhances solubility and stability of the compound. It is also utilized in the development of peptide-based drugs, where it helps improve bioavailability and reduce immunogenicity. Additionally, it finds application in material science for modifying surfaces to create biocompatible coatings.