Used in the synthesis of pharmaceutical intermediates, particularly in the development of biodegradable polymers and prodrugs. Its structure supports conjugation with active pharmaceutical ingredients to improve solubility and controlled release. Commonly applied in drug delivery systems where ester or amide linkages are needed for enzymatic cleavage in vivo. Also utilized in the preparation of functionalized polyethylene glycol (PEG)-based compounds for bioconjugation, enhancing the pharmacokinetic profile of therapeutic molecules.