2'-O-Acetyl-5'-O-(p-toluoyl)-3'-deoxy-3'-fluoro-5-methyluridine is a nucleoside and Reagent - Fluoro-modified nucleoside; 5-Modified pyrimidine nucleoside.
5'-O-(4,4'-Dimethoxytrityl)-2'-O-(2-methoxyethyl)-5-methyluridine is a Nucleoside Derivative - 2'-Modified nucleoside; Protected nucleoside with NH2 OH open; Ready for further phosphorylation.