[5'-O-DMTr-2'-dG(iBu)](pCyEt)[2'-dG(iBu)](pCyEt)[2'-dG(iBu)-3'-CE-Phosphoramidite]

[N2-isobutyryl-5'-O-(4, 4'-dimethoxytrityl)-2'-deoxyguanosine](pCyEt)[N2-isobutyryl-2'-deoxyguanosine](pCyEt)[N2-isobutyryl-2'-deoxyguanosine-3'-O-((2-cyanoethyl)-N, N-diisopropyl)-Phosphoramidite]