Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of radiolabeled agents for imaging studies due to the presence of iodine. The tert-butyl ester group allows for selective deprotection under mild acidic conditions, enabling stepwise construction of complex molecules. Its polyether chain provides solubility in polar solvents and enhances biocompatibility, making it suitable for conjugation in prodrug design and targeted drug delivery systems.