Uridine, 2'-O-(9-phenyl-9H-xanthen-9-yl)-

Uridine, 2',3'-O-(1-methylethylidene)-, 5'-[methyl bis(1-methylethyl)phosphoramidite]

Cytidine, N-benzoyl-2'-O-(9-phenyl-9H-xanthen-9-yl)-

Uridine, 4-O-methyl-5-pentyl-, 2',3',5'-tribenzoate

Uridine, 5-butyl-4-O-methyl-, 2',3',5'-tribenzoate

1-[2-Deoxy-3-C-methyl-5-O-(methylsulfonyl)-β-D-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[2-Deoxy-3-C-methyl-5-O-(triphenylmethyl)-β-D-threo-pentofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

N-[(2-Nitrophenyl)methylene]adenosine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-N-[(1-naphthalenylamino)carbonyl]adenosine

[(4R,6R,7S)-4-(3,4-Dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-7-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-5-oxaspiro[2.4]hept-6-yl]methyl 2-methylpropanoate

1-[(4R,6R,7S)-7-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-6-(hydroxymethyl)-5-oxaspiro[2.4]hept-4-yl]-2,4(1H,3H)-pyrimidinedione

1-[(4R,6R,7S)-7-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-6-[[(4-methoxyphenyl)diphenylmethoxy]methyl]-5-oxaspiro[2.4]hept-4-yl]-2,4(1H,3H)-pyrimidinedione

(4R,6R,7S)-6-[(2-Methyl-1-oxopropoxy)methyl]-4-[2-oxo-4-(1H-1,2,4-triazol-1-yl)-1(2H)-pyrimidinyl]-5-oxaspiro[2.4]hept-7-yl 2-methylpropanoate

4-Amino-1-[(6'aR,8'R,9'aS)-dihydro-2',2',4',4'-tetrakis(1-methylethyl)spiro[cyclopropane-1,9'(8'H)-[6H]furo[3,2-f][1,3,5,2,4]trioxadisilocin]-8'-yl]-2(1H)-pyrimidinone