3'-O-tert-butyldimethylsilyl-5'-O-tert-butyldiphenylsilyl-4'-C-phenoxymethylenethymidine

1-((2R,4S,5S)-5-Benzyloxymethyl-4-hydroxy-5-hydroxymethyl-tetrahydro-furan-2-yl)-5-methyl-1H-pyrimidine-2,4-dione

4-N-benzoyl-3'-O-tert-butyldimethylsilyl-5'-O-tert-butyldiphenylsilyl-4'-C-methoxymethyl-5-methylcytidine

1-[(2R,4S,5S)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(tert-butyl-diphenyl-silanyloxymethyl)-5-(1-hydroxy-ethyl)-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione

1-[(2R,4S,5S)-4-(tert-Butyl-dimethyl-silanyloxy)-5-(tert-butyl-diphenyl-silanyloxymethyl)-5-(1-hydroxy-propyl)-tetrahydro-furan-2-yl]-5-methyl-1H-pyrimidine-2,4-dione