Used in the synthesis of peptides and other biomolecules, featuring a Boc (tert-butoxycarbonyl) group for protecting functional groups during synthesis. It includes a PEG (polyethylene glycol) segment that improves solubility and stability, and a C4-Cl (4-chlorobutyl) chain acting as a linker for connecting molecules. This makes it valuable in pharmaceutical research as a building block for peptide synthesis and complex molecules with specific biological activities, drug development for attaching protective groups and linking units to enhance stability and efficacy, targeted drug delivery systems for better bioavailability, and bioconjugation for attaching molecules to proteins or biomolecules in diagnostic and therapeutic applications, as well as nanomaterial development.