1-Cyclopropyl-5-[5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-Cyclohexyl-5-[5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-Cyclopentyl-5-[5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

Methyl3,4-dihydro-2,4-dioxo-5-β-D-ribofuranosyl-1(2H)-pyrimidinepropanoate

1-Cyclobutyl-5-[5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

5-[2,3,5-Tris-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

1-Methyl-2'-O-methylpseudouridine

1-(Hydroxymethyl)-5-β-D-ribofuranosyl-2,4(1H,3H)-pyrimidinedione

1-Propyl-5-β-D-ribofuranosyl-2,4(1H,3H)-pyrimidinedione

5-(2-Deoxy-2-fluoro-β-D-ribofuranosyl)-2,4(1H,3H)-pyrimidinedione

5'-O-DMT-2'-O-TBDMS-Pseudouridine

5-(3,5-Di-O-phosphono-β-D-ribofuranosyl)-2,4(1H,3H)-pyrimidinedione

1-Hydroxy-5-β-D-ribofuranosyl-2,4(1H,3H)-pyrimidinedione

5-(3-Azido-2,3-dideoxy-β-D-erythro-pentofuranosyl)-2,4(1H,3H)-pyrimidinedione

5'-DMT-Pseudouridine

5-[5-O-[(4-Methoxyphenyl)diphenylmethyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

1,6-Dimethyl-5-β-D-ribofuranosyl-2,4(1H,3H)-pyrimidinedione

3,4-Dihydro-2,4-dioxo-5-β-D-ribofuranosyl-1(2H)-pyrimidinepropanoicacid

5-[2,3-O-(1-Methylethylidene)-5-O-[(4-methylphenyl)sulfonyl]-β-D-ribofuranosyl]-2,4(1H,3H)-pyrimidinedione

2,4(1H,3H)-Pyrimidinedione,1,3-dimethyl-5-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-ribofuranosyl]-