Uridine, 3′-deoxy-2′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-[[(2-methylpropoxy)sulfonyl]methylene]-

(4S,5R)-4-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-5-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]octahydro-1′,3′-dioxospiro[furan-2(3H),7′(1′H)-pyrrolo[1,2-c]pyrimidine]-5′-carbonitrile

9-(5,6-Dideoxy-β-D-ribo-hex-5-ynofuranosyl)-N-(3-methylbicyclo[2.2.1]hept-2-yl)-9H-purin-6-amine

N-Bicyclo[3.2.0]hept-6-yl-9-(5,6-dideoxy-β-D-ribo-hex-5-ynofuranosyl)-9H-purin-6-amine

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-3-ethenyl-6-(hydroxymethyl)-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-3-(1-propyn-1-yl)-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-3-(3-thienyl)-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-3-phenyl-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-3-[(1E)-3-hydroxy-1-propen-1-yl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

Methyl (2E)-3-[(5R,6R,8R,9R)-4-amino-8-(3,4-dihydro-3,5-dimethyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-3-yl]-2-propenoate

Ethyl (2E)-3-[(5R,6R,8R,9R)-4-amino-8-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-3-yl]-2-propenoate

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-(hydroxymethyl)-3-iodo-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-3-iodo-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-3-bromo-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-3-chloro-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-5-methyl-2,4(1H,3H)-pyrimidinedione

1,7-Dioxa-2-thiaspiro[4.4]non-3-ene-3-acetamide, 4-[(2-amino-2-oxoethyl)amino]-8-(3,4-dihydro-3,5-dimethyl-2,4-dioxo-1(2H)-pyrimidinyl)-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-, 2,2-dioxide, (5R,6R,8R,9R)-

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-3-(2-propen-1-yl)-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2,2-dioxido-4-(2-propen-1-ylamino)-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-4-Amino-9-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-3-methyl-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione

1-[(5R,6R,8R,9R)-9-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-6-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-3-methyl-4-(methylamino)-2,2-dioxido-1,7-dioxa-2-thiaspiro[4.4]non-3-en-8-yl]-3,5-dimethyl-2,4(1H,3H)-pyrimidinedione