Pomalidomide 5'-piperazine-4-methylpiperidine dihydrochloride is the Pomalidomide (HY-10984)-based cereblon (CRBN) ligand used in the recruitment of CRBN protein. Pomalidomide 5'-piperazine-4-methylpiperidine dihydrochloride can be connected to the ligand for protein by a linker to form PROTAC.