Thalidomide-O-amido-PEG3-C2-NH2 TFA (Cereblon Ligand-Linker Conjugates 3 (TFA)) is a synthesized E3 ligase ligand-linker conjugate. Thalidomide-O-amido-PEG3-C2-NH2 TFA incorporates the Thalidomide based cereblon ligand and 3-unit PEG linker used in PROTAC technology.