Used primarily as an active ester in peptide synthesis, this compound enables efficient coupling of amino acids by enhancing the reactivity of carboxyl groups. It is especially valuable in solid-phase peptide synthesis where the fluorenylmethyloxycarbonyl (Fmoc) protecting group is employed, allowing for mild deprotection conditions. The polyether chain improves solubility in polar solvents, facilitating reactions in aqueous or mixed solvent systems. Its structure supports the synthesis of complex peptides and peptidomimetics used in pharmaceutical research and development.