5'-amino-5'-deoxy-5-methyl-2'-O,4'-C-methyleneuridine

5'-azido-5'-deoxy-5-methyl-2'-O,4'-C-methyleneuridine

(1S,3R,4R,7S)-7-benzyloxy-1-hydroxymethyl-3-(thymin-1-yl)-2,5-dioxabicyclo[2.2.1]heptane

5'-O-mesyl-5-methyl-2'-O,4'-C-methyleneuridine

N4-benzoyl-5'-O-tert-butyldiphenylsilyl-2',3'-di-O-acetyl-4'-C-(p-toluenesulfonyl)oxymethylcytidine