(S,R,S)-AHPC-PEG4-N3 (VHL Ligand-Linker Conjugates 5) is a synthesized conjugate that functions as a ligand-linker in E3 ligase-based systems. It is composed of the (S,R,S)-AHPC VHL ligand and a 4-unit PEG linker, both commonly employed in PROTAC technology.