6-Chloro-9-(2,5-di-O-acetyl-3-deoxy-β-D-erythro-pentofuranosyl)-9H-purine

6-Azido-9-(3-deoxy-β-D-erythro-pentofuranosyl)-9H-purine

2,3,4a,5,8,8a-Hexahydro-2-thioxo-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-5,8-etheno-1H-pyrano[3,4-d]pyrimidine-4,6-dione

4a,5,8,8a-Tetrahydro-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-5,8-etheno-1H-pyrano[3,4-d]pyrimidine-2,4,6(3H)-trione

1-[2,5-Anhydro-4-C-[[bis(4-methoxyphenyl)phenylmethoxy]methyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-6-deoxy-β-D-gulofuranosyl]-5-methyl-2,4(1H,3H)-pyrimidinedione

Uridine, 5,6-bis(aminocarbonyl)-

4H-Pyrimido[1,6-a]pyrimidine-4,6(7H)-dione, 1,9a-dihydro-7-β-D-ribofuranosyl-

1-β-D-Ribofuranosylpyrimido[4,5-d]pyrimidine-2,4,5(1H,3H,6H)-trione

5,6-Dihydro-1-β-D-ribofuranosyl-1H-pyrrolo[3,4-d]pyrimidine-2,4,7(3H)-trione

1-β-D-Ribofuranosyl-1H-pyrrolo[3,4-d]pyrimidine-2,4,5,7(3H,6H)-tetrone

5,6-Dihydro-3-β-D-ribofuranosyl-2(3H)-pteridinone

2,6-Pteridinedione, 3,5,7,8-tetrahydro-3-β-D-ribofuranosyl-

7,8-Dihydro-1-β-D-ribofuranosyl-2,4(1H,3H)-pteridinedione

5,8-Dihydro-1-β-D-ribofuranosyl-2,4,7(1H,3H,6H)-pteridinetrione

N-(6-Amino-1,2,3,4-tetrahydro-2,4-dioxo-1-β-D-ribofuranosyl-5-pyrimidinyl)glycine ethyl ester

2,3,5,10-Tetrahydro-2-thioxo-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)benzo[g]quinazolin-4(1H)-one

5,10-Dihydro-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)benzo[g]quinazoline-2,4(1H,3H)-dione

2,3,4a,8a-Tetrahydro-5,7-dimethyl-2-thioxo-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-4(1H)-quinazolinone

4a,8a-Dihydro-5,7-dimethyl-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-2,4(1H,3H)-quinazolinedione