This compound is primarily utilized in the field of targeted drug delivery and bioconjugation. It serves as a linker molecule, connecting therapeutic agents like pomalidomide to other molecules or delivery systems, enhancing their efficacy and specificity. The PEG4 spacer improves solubility and reduces immunogenicity, while the C2-NH2 group allows for easy conjugation with various functional groups. This makes it valuable in developing antibody-drug conjugates (ADCs) and other targeted therapies, particularly in cancer treatment, where precise delivery of drugs to tumor cells is crucial. Its application also extends to research in proteolysis-targeting chimeras (PROTACs), aiding in the degradation of disease-causing proteins.