3'-S-(2-Cyanoethyl-N,N-diisopropylphosphorothioamidite)- N4-benzoyl-3'-deoxy-5'-O-(4,4'-dimethoxytrityl)cytidine
3'-s-(2-cyanoethyl-n,n-diisopropylphosphorothioamidite)- n4-benzoyl-3'-deoxy-5'-o-(4,4'-dimethoxytrityl)cytidine