Thalidomide-O-amido-PEG3-C2-NH2 hydrochloride is a chemical compound that has been synthesized as an E3 ligase ligand-linker conjugate. This compound incorporates a cereblon ligand derived from Thalidomide and a 3-unit PEG linker. It is specifically designed for use in PROTAC technology, which utilizes small molecules to induce protein degradation [1].