1-[(4S,5R,7R,8R)-7-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-8-hydroxy-1,6-dioxaspiro[3.4]oct-5-yl]-2,4(1H,3H)-pyrimidinedione

1-[(4S,5R,7R,8R)-8-Hydroxy-7-(hydroxymethyl)-1,6-dioxaspiro[3.4]oct-5-yl]-2,4(1H,3H)-pyrimidinedione

1-[(2′S,6aR,8R,9aR)-Dihydro-2,2,4,4-tetrakis(1-methylethyl)spiro[6H-furo[3,2-f]-1,3,5,2,4-trioxadisilocin-9(8H),2′-oxetan]-8-yl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-[2-[(Methylsulfonyl)oxy]ethyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-(2-Hydroxyethyl)-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

Phosphoramidous acid, bis(1-methylethyl)-, (5S,6R,8R,9R)-8-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-6-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-1,7-dioxaspiro[4.4]non-9-yl 2-cyanoethyl ester

1-[(5S,6R,8R,9R)-8-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-9-hydroxy-1,7-dioxaspiro[4.4]non-6-yl]-2,4(1H,3H)-pyrimidinedione

1-[(5S,6R,8R,9R)-9-Hydroxy-8-(hydroxymethyl)-1,7-dioxaspiro[4.4]non-6-yl]-2,4(1H,3H)-pyrimidinedione

1-[(2S,6′aR,8′R,9′aR)-Tetrahydro-2′,2′,4′,4′-tetrakis(1-methylethyl)spiro[furan-2(3H),9′(8′H)-[6H]furo[3,2-f][1,3,5,2,4]trioxadisilocin]-8′-yl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-[3-[(Methylsulfonyl)oxy]propyl]-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-(3-Hydroxypropyl)-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-[2-C-2-Propen-1-yl-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-2,4(1H,3H)-pyrimidinedione

Uridine, 2′-C-(3-hydroxypropyl)-5-methyl-

Phosphoramidous acid, bis(1-methylethyl)-, (4R,5R,7R,8R)-7-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-1,6-dioxaspiro[3.4]oct-8-yl 2-cyanoethyl ester

1-[(4R,5R,7R,8R)-7-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-8-hydroxy-1,6-dioxaspiro[3.4]oct-5-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(4R,5R,7R,8R)-7-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-8-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1,6-dioxaspiro[3.4]oct-5-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5-methyl-2′-C-[2-[(methylsulfonyl)oxy]ethyl]-

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′-C-(2-hydroxyethyl)-5-methyl-

Phosphoramidous acid, bis(1-methylethyl)-, (5R,6R,8R,9R)-8-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-6-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-1,7-dioxaspiro[4.4]non-9-yl 2-cyanoethyl ester

1-[(5R,6R,8R,9R)-8-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-9-hydroxy-1,7-dioxaspiro[4.4]non-6-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione