Used in pharmaceutical research as a linker or functionalized spacer in the development of targeted drug delivery systems. Its polyether chain provides water solubility and flexibility, while the imidazolone-thiophene moiety enables bioconjugation or interaction with biological targets. Commonly employed in the synthesis of antibody-drug conjugates (ADCs) and diagnostic probes due to its stability and biocompatibility. Also utilized in modifying peptides or proteins to enhance pharmacokinetic properties.