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

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