3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-methyl-β-D-ribofuranosyl]-3,5-dihydro-5-methyl-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-methyl-β-D-ribofuranosyl]-3,5-dihydro-5-methyl-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-methyl-β-D-ribofuranosyl]-3,5-dihydro-5-methyl-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3,5-Dihydro-5-methyl-3-(2-O-methyl-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3-(3,5-Di-O-acetyl-2-O-methyl-β-D-ribofuranosyl)-3,5-dihydro-5-methyl-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3-(3,5-Di-O-acetyl-2-O-methyl-β-D-ribofuranosyl)-3,5-dihydro-5-methyl-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3,5-Dihydro-5-methyl-3-(2-O-methyl-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3,5-Dihydro-5-methyl-3-β-D-ribofuranosyl-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3,5-Dihydro-5-methyl-3-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3,5-Dihydro-5-methyl-3-β-D-ribofuranosyl-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3,5-Dihydro-5-methyl-3-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purin-9-one

9H-[1,2,4]Triazolo[1,5-a]purin-9-one, 3,4-dihydro-3-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-

3,5-Dihydro-5-methyl-3-(2-O-methyl-3-O-phosphono-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purine-9-thione

3,5-Dihydro-5-methyl-3-(2-O-methyl-3-O-phosphono-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3,5-Dihydro-5-methyl-3-(3-O-phosphono-β-D-ribofuranosyl)-9H-[1,2,4]triazolo[1,5-a]purin-9-one

3′-Inosinic acid, 1-methyl-6-thio-

1-[3,5-Di-O-acetyl-2-deoxy-2-[(2,2,2-trifluoro-1-thioxoethyl)amino]-β-D-ribofuranosyl]-3,4-dihydro-4-thioxo-2(1H)-pyrimidinone

1,6-Dihydro-6-(4-nitrophenyl)-1-β-D-ribofuranosyl-7H-pyrazolo[3,4-d]pyridazin-7-one

6-(4-Chlorophenyl)-1,6-dihydro-1-β-D-ribofuranosyl-7H-pyrazolo[3,4-d]pyridazin-7-one

1,6-Dihydro-6-(phenylmethyl)-1-β-D-ribofuranosyl-7H-pyrazolo[3,4-d]pyridazin-7-one