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

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

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

[(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

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

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

(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

(4R,6R,7S)-4-(3,4-Dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-6-[(2-methyl-1-oxopropoxy)methyl]-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

3-Benzoyl-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]-2,4(1H,3H)-pyrimidinedione

1H-1,2,4-Triazole-3-carboxamide, 1-[5-O-(3-carboxy-2-methyl-1-oxobutyl)-β-D-ribofuranosyl]-

1H-1,2,4-Triazole-3-carboxamide, 1-[5-O-(3-carboxy-1-oxopropyl)-β-D-ribofuranosyl]-

2-S-Propyl-2-thiouridine

1-[1-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-7-methyl-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

Adenosine, 2',3'-dihexadecanoate

Guanosine, 2',3'-O-(phenylmethylene)-, 5'-octadecanoate

Uridine, 2',3'-dideoxy-3'-(2-propenyl)-

3'-Deoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-(2-propen-1-yl)thymidine