5'-O-(4,4'-dimethoxytrityl)-5-(S-(2,4-dinitrophenyl)thio)-2'-deoxyuridine 3'-O-(2-cyanoethyl N,N'-diisopropylphosphoramidite)
5'-o-(4,4'-dimethoxytrityl)-5-(s-(2,4-dinitrophenyl)thio)-2'-deoxyuridine 3'-o-(2-cyanoethyl n,n'-diisopropylphosphoramidite)