6-Chloro-4-methyl-7-(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)-2H-1-benzopyran-2-one

4-Phenyl-7-(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)-2H-1-benzopyran-2-one

4-Methyl-7-(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)-2H-1-benzopyran-2-one

7-(1-β-D-Ribofuranosyl-1H-1,2,3-triazol-4-yl)-2H-1-benzopyran-2-one

6-Chloro-4-methyl-7-[(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)methoxy]-2H-1-benzopyran-2-one

4-Phenyl-7-[(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)methoxy]-2H-1-benzopyran-2-one

4-Methyl-7-[(1-β-D-ribofuranosyl-1H-1,2,3-triazol-4-yl)methoxy]-2H-1-benzopyran-2-one

7-[(1-β-D-Ribofuranosyl-1H-1,2,3-triazol-4-yl)methoxy]-2H-1-benzopyran-2-one

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7H-purin-6-yl]-N,N-dimethylmethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-6,7-dihydro-6-oxo-1H-purin-2-yl]-N,N-dimethylethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-6,7-dihydro-6-oxo-1H-purin-2-yl]-N,N-dimethylethanimidamide

N′-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-6,7-dihydro-6-oxo-1H-purin-2-yl]-N,N-dimethylethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7H-purin-6-yl]-N,N-dimethylethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(hydroxyphosphinyl)-β-D-erythro-pentofuranosyl]-7H-purin-6-yl]-N,N-dimethylethanimidamide

N′-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-7H-purin-6-yl]-N,N-dimethylethanimidamide

N′-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-7H-purin-6-yl]-N,N-dimethylethanimidamide

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-(2-methylpropoxy)-7H-purine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-(1-methylethoxy)-7H-purine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-6-propoxy-7H-purine