[5′-O-DMTr-2′-OMe-G(iBu)](pCyEt)[2′-OMe-C(Ac)-3′-CE-Phosphoramidite]

[5'-O-(4, 4'-dimethoxytrityl)-2'-O-methyl-G(isobutyryl)](pCyEt)[2'-O-methyl-C(acetyl)-3'-cyanoethyl-Phosphoramidite]