N3-cyanoethyl-5'-O-DMTr-2'-OMOE-5-Me-U-3'-CE-phosphoramidite

N3-cyanoethyl-5'-O-(4, 4'-dimethoxytrityl)-2'-O-methoxyethyl-5-methyl-uridine-3'-O-[(2-cyanoethyl)-N, N-diisopropyl] Phosphoramidite