2'-deoxy-5'-O-(4,4'-dimethoxytrityl)-N2-isobutyrylguanosin-3'-(2-cyanethyldiisopropylphosphoramidit)
2′-deoxy-5′-O-(4,4′-dimethoxytrityl)-N2-isobutyrylguanosine 3′-(2-cyanoethyl diisopropylphosphoramidite)