5'-Dimethoxytrityl-N-benzoyl-2'-OMe-Adenosine, 3'-O-(N,N-diisopropylamino)-phosphinyl-1,1-dimethyl-2-cyanoethyl acetate
5'-Dimethoxytrityl-N-acetyl-2'-OMe-Cytidine, 3'-O-(N,N-diisopropylamino)-phosphinyl-1,1-dimethyl-2-cyanoethyl acetate
5'-Dimethoxytrityl-N-isobutyryl-2'-OMe-Guanosine, 3'-O-(N,N-diisopropylamino)-phosphinyl-1,1-dimethyl-2-cyanoethyl acetate
5'-Dimethoxytrityl-2'-OMe-Uridine,3'-O-(N,N-diisopropylamino)-phosphinyl-1,1-dimethyl-2-cyanoethyl acetate