Lenalidomide 4'-PEG3-amine dihydrochloride is the Lenalidomide-based Cereblon ligand used in the recruitment of CRBN protein. Lenalidomide 4'-PEG3-amine dihydrochloride can be connected to the ligand for protein by a linker to form PROTAC[1].
References
[1] Wang S, et al. Monofunctional intermediates for ligand-dependent target protein degradation. China, WO2017176958A1. 2017-10-12.