Used in pharmaceutical research as a linker or spacer in the development of targeted drug delivery systems, particularly in antibody-drug conjugates (ADCs). Its structure contains both hydrophilic polyether segments and a functional amide bond, enabling improved solubility and controlled release of active agents. The terminal amine group allows for further chemical modification, making it valuable in bioconjugation strategies. Additionally, the rigid heterocyclic component may enhance binding specificity in therapeutic molecules.