5′-O-DMTr-2′-dG(iBu)-3′-O-[P-methyl-(N, N-diisopropyl)]-Phosphonamidite

N2-isobutyryl-5'-O-(4, 4'-dimethoxytrityl)-2'-deoxyguanosine-3'-O-[P-methyl-(N, N-diisopropyl)]-Phosphonamidite