(S,R,S)-AHPC-PEG4-NH2 (Standard) is the analytical standard of (S,R,S)-AHPC-PEG4-NH2 (HY-103604A). This product is intended for research and analytical applications. (S,R,S)-AHPC-PEG4-NH2 is a synthesized E3 ligase ligand-linker conjugate that incorporates the (S,R,S)-AHPC based VHL ligand and 4-unit PEG linker used in PROTAC technology.