N-[5-[2-Deoxy-3,5-bis-O-(trimethylsilyl)-β-D-erythro-pentofuranosyl]-4,5-dihydro-4-oxo-1,3,5-triazin-2-yl]-2-phenoxyacetamide

[P(R)]-2′-Deoxy-P-thio-5-azacytidylyl-(3′→5′)-2′-deoxyguanosine

2′-Deoxy-5′-O-(1,19-dihydroxy-1-oxido-2,5,8,11,14,17-hexaoxa-1-phosphanonadec-1-yl)-5-azacytidylyl-(3′→5′)-2′-deoxyguanosine

[P(S)]-2′-Deoxy-P-thio-5-azacytidylyl-(3′→5′)-2′-deoxyguanosine

(3aR,4R,10S,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-3a,10,11,11a-tetrahydro-2,2-dimethyl-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,10S,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-3a,10,11,11a-tetrahydro-2,2-dimethyl-7-[(phenylmethoxy)methyl]-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,10S,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-3a,10,11,11a-tetrahydro-7-[(4-methoxyphenyl)methyl]-2,2-dimethyl-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,9aS,10R,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-2,2-dimethyl-7-[(phenylmethoxy)methyl]-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,9aS,10R,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-7-[(4-methoxyphenyl)methyl]-2,2-dimethyl-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,9aS,10S,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-2,2-dimethyl-7-[(phenylmethoxy)methyl]-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

(3aR,4R,9aS,10S,11S,11aR)-10-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]hexahydro-7-[(4-methoxyphenyl)methyl]-2,2-dimethyl-4,11-epoxy-1,3-dioxolo[4,5-e]pyrimido[1,6-a]azepine-6,8(4H,7H)-dione

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-2′,3′-O-(1-methylethylidene)-3-[(phenylmethoxy)methyl]-6-(phenylseleno)uridine

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-3-[(4-methoxyphenyl)methyl]-2′,3′-O-(1-methylethylidene)-6-(phenylseleno)uridine

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-3-[(4-methoxyphenyl)methyl]-2′,3′-O-(1-methylethylidene)uridine

1,6-Didehydro-2′-deoxy-5,6-dihydro-5-methoxy-8-[(3-methyl-3H-imidazo[4,5-f]quinolin-2-yl)amino]guanosine

2-Amino-7-([1,1′-biphenyl]-4-ylamino)-6-(2-deoxy-β-D-erythro-pentofuranosyl)-1,3,6,8-tetraazaspiro[4.4]nona-1,7-diene-4,9-dione

2-Amino-6-(2-deoxy-β-D-erythro-pentofuranosyl)-7-[(3-methyl-3H-imidazo[4,5-f]quinolin-2-yl)amino]-1,3,6,8-tetraazaspiro[4.4]nona-1,7-diene-4,9-dione

N-[3-(2-Deoxy-β-D-erythro-pentofuranosyl)-3,5-dihydro-2-[(3-methyl-3H-imidazo[4,5-f]quinolin-2-yl)amino]-5-oxo-4H-imidazol-4-ylidene]guanidine

2′-Deoxy-8-(9H-fluoren-3-ylamino)guanosine

2′-Deoxy-8-(9H-fluoren-3-ylamino)-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]guanosine