5′-O-DMTr-2′-O-(methoxycarbonyl)methyl-5-Me-C(iBu)-3′-CE-Phosphoramidite

N6-benzoyl-5'-O-(4,4'-Dimethoxytrityl)-2'-O-(methoxycarbonyl)methyl-5-methyl-cytidine-3'-[(2-cyanoethyl)-(N,N-diisopropyl)]-Phosphoramidite