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

5'-O-(4, 4'-dimethoxytrityl)-2'-O-methyl-uridine](pCyEt)[2'-O-methyl-guanosine(isobutyryl)](pCyEt)[2'-O-methyl-guanosine(isobutyryl)-3'-cyanoethyl-Phosphoramidite]