[5′-O-DMTr-2′-OMe-A(Bz)](pCyEt)[2′-O-Me-C(Ac)-3′-CE-Phosphoramidite]

[5'-O-(4, 4'-dimethoxytrityl)-2'-O-methyl-A(benzoyl)](pCyEt)[2'-O-Me-C(acetyl)-3'-cyanoethyl-Phosphoramidite]