Used in the synthesis of complex organic molecules, particularly in peptide chemistry and drug development. It serves as a protecting group for functional groups during chemical reactions, ensuring selective modification of specific sites. Its peg3 linker enhances solubility and stability, making it valuable in creating bioactive compounds and conjugates for targeted drug delivery systems. Additionally, it is employed in the preparation of intermediates for pharmaceuticals, enabling the development of therapeutic agents with improved efficacy and reduced side effects.