E3 ligase Ligand-Linker Conjugates 50 Cereblon Ligand-Linker Conjugates 13 Pomalidomide-PEG1-C2-N3 4-((2-(2-azidoethoxy)ethyl)amino)-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione 1H-Isoindole-1,3(2H)-dione, 4-[[2-(2-azidoethoxy)ethyl]amino]-2-(2,6-dioxo-3-piperidinyl), 4-((2-(2-Azidoethoxy)ethyl]amino]-2-(2,6-dioxopiperidin-3-yl]isoindoline-1,3-dione, 4-[[2-(2-Azidoethoxy)ethyl]amino]-2-(2,6-dioxo-3-piperidinyl)-1H-isoindole-1,3(2H)-dione Poma-PEG1-N3