Used in the synthesis of complex molecules, particularly in pharmaceutical research, where it serves as a versatile building block. Its trifluoroethyl group enhances metabolic stability and bioavailability of drug candidates. The PEG4 spacer improves solubility and allows for better conjugation with other molecules, making it valuable in the development of targeted therapies and prodrugs. Additionally, it is employed in the creation of bioconjugates for diagnostic imaging and drug delivery systems, leveraging its ability to modify pharmacokinetic properties.