Used in pharmaceutical research as a key intermediate in the synthesis of proteolysis-targeting chimeras (PROTACs). It serves as a linker component that connects target protein ligands to E3 ubiquitin ligase ligands, enabling targeted protein degradation within cells. Its structure supports high binding specificity and stability in biological systems, making it valuable in developing therapeutics for cancer, neurodegenerative diseases, and other conditions involving dysfunctional proteins. Commonly employed in preclinical studies to optimize degradation efficiency and pharmacokinetic properties of novel PROTAC molecules.