5′-DMT-2′-O-NMA-5-Me-C(iBu)-3′-CE-Phosphoramidite

[4-N-isobutyryl-5'-O-(4, 4'-dimethoxytrityl)-2'-O-[2-(methylamino)-2-oxoethyl]-5-methylcytidine]-3'-[(2-cyanoethyl)-N, N-diisopropyl]phosphoramidite