5'-O-(4,4'-dimethoxytrityl)-2'-O-(pyren-1-ylmethanimine-N-oxymethyl)uridine
5'-O-(4,4'-dimethoxytrityl)-3'-O-[(N,N-diisopropylamino)(2-cyanoethyl)]phosphinyl-2'-O-(pyren-1-ylmethanimine-N-oxymethyl)uridine
5'-O-(4,4'-dimethoxytrityl)-2'-O-[2-(methylsulfinyl)ethanimine-N-oxymethyl]uridine
5'-O-(4,4'-dimethoxytrityl)-3'-O-[(N,N-diisopropylamino)-(2-cyanoethyl)]phosphinyl-2'-O-[2-(methylsulfinyl)ethanimine-N-oxymethyl]uridine
5'-O-(4,4'-dimethoxytrityl)-3'-O-[(NN-diisopropylamino)(2-cyanoethyl)]phosphinyl-2'-O-(methoxymethanimine-N-oxymethyl)uridine