4-N-benzoyl-5-methyl-2'-O,4'-C-(methylenoxymethylene)cytidine

4'-C-acetoxymethyl-2'-O-acetyl-3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-5-methyluridine

4-N-benzoyl-3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-5-methyl-2'-O,4'-C-(methylenoxymethylene)cytidine

4-N-benzoyl-3'-O-benzyl-5-methyl-2'-O,4'-C-(methylenoxymethylene)cytidine

3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-5-methyl-2'-O,4'-C-(methylenoxymethylene)uridine

4-C-acetoxymethyl-1,2-di-O-acetyl-3-O-benzyl-5-O-tert-butyldiphenylsilyl-D-erythro-pentofuranose

{3-[(2,2-dimethyl-1,1-diphenyl-1-silapropoxy)methyl]-(1S,3R,4S,5R)-7,7-dimethyl-2,6,8-trioxa-4-(phenylmethoxy)bicyclo[3.3.0]oct-3-yl}methan-1-ol

3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-5-methyl-2'-O,4'-C-(methylenoxymethylene)cytidine

3'-O-benzyl-5'-O-tert-butyldiphenylsilyl-4'-C-hydroxymethyl-5-methyluridine