This chemical is primarily used in bioconjugation and drug delivery systems. It serves as a linker molecule, facilitating the attachment of various functional groups or therapeutic agents to biomolecules such as proteins, peptides, or antibodies. The presence of the PEG (polyethylene glycol) spacer enhances solubility and reduces immunogenicity, making it suitable for applications in targeted drug delivery and controlled release formulations. Additionally, its tert-butyl ester group allows for selective deprotection under mild conditions, enabling precise modifications in complex synthesis processes. This compound is particularly valuable in the development of prodrugs and bioconjugates for cancer therapy and other biomedical applications.