– Lenalidomide hydrochloride (CC-5013 hydrochloride), a Thalidomide derivative, functions as molecular glue and serves as an orally active immunomodulator. As a ligand for the ubiquitin E3 ligase cereblon (CRBN), it facilitates the selective ubiquitination and degradation of the lymphoid transcription factors IKZF1 and IKZF3 through the CRBN-CRL4 ubiquitin ligase. Specifically, Lenalidomide hydrochloride inhibits the growth of mature B-cell lymphomas, including multiple myeloma, and promotes IL-2 release from T cells [1] [2].