2,4(1H,3H)-Pyrimidinedione, 1-[2-C-(2-ethoxy-2-oxoethyl)-2-S-phenyl-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-2-thio-β-D-arabinofuranosyl]-

Uridine, 2′-C-[2-(1,1-dimethylethoxy)-2-oxoethyl]-2′-S-phenyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-2′-thio-

Uridine, 2′-C-(2-ethoxy-2-oxoethyl)-2′-S-phenyl-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-2′-thio-

Uridine, 2′-deoxy-2′-[2-(1,1-dimethylethoxy)-2-oxoethylidene]-, (2′Z)-

1-[(4R,6R,6aS)-2,4,6,6a-Tetrahydro-2-oxo-6-[[[tris(1-methylethyl)silyl]oxy]methyl]furo[3,4-b]furan-4-yl]-2,4(1H,3H)-pyrimidinedione

1-[(3aS,4R,6R,6aR)-Hexahydro-2-oxo-3a-(phenylthio)-6-[[[tris(1-methylethyl)silyl]oxy]methyl]furo[3,4-b]furan-4-yl]-2,4(1H,3H)-pyrimidinedione

Uridine, 2′-deoxy-2′-(2-ethoxy-2-oxoethylidene)-5′-O-[tris(1-methylethyl)silyl]-, (2′Z)-

Uridine, 2′-deoxy-2′-(2-ethoxy-2-oxoethylidene)-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-, (2′Z)-

Uridine, 2′-deoxy-2′-[2-(1,1-dimethylethoxy)-2-oxoethylidene]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-, (2′Z)-

9-β-D-Arabinofuranosyl-6-azido-9H-purine

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-3,4-dihydro-7-hydroxy-11H-benzimidazo[1,2-a]purin-11-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3,4-dihydro-7-hydroxy-11H-benzimidazo[1,2-a]purin-11-one

4-Amino-3-bromo-1,6-dihydro-1-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furanyl]-7H-pyrrolo[2,3-d]pyridazin-7-one

4-Amino-1,6-dihydro-1-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furanyl]-7H-pyrrolo[2,3-d]pyridazin-7-one

Ethyl 3-cyano-1-[(2R,5S)-tetrahydro-5-(hydroxymethyl)-2-furanyl]-1H-pyrrole-2-carboxylate

Ethyl 3-cyano-1-[(2R,5S)-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]tetrahydro-2-furanyl]-1H-pyrrole-2-carboxylate

Ethyl 3-cyano-1-[2-deoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-3-O-(phenoxythioxomethyl)-β-D-erythro-pentofuranosyl]-1H-pyrrole-2-carboxylate

Ethyl 3-cyano-1-[2-deoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1H-pyrrole-2-carboxylate

4-Amino-3-bromo-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1,6-dihydro-7H-pyrrolo[2,3-d]pyridazin-7-one

Ethyl 3-cyano-1-(2-deoxy-β-D-erythro-pentofuranosyl)-1H-pyrrole-2-carboxylate