1-[5-O-[(1,1-Dimethylethyl)diphenylsilyl]-β-D-arabinofuranosyl]-2-(methylamino)-4(1H)-pyrimidinone

2-(Cyclohexylamino)-1-[5-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-arabinofuranosyl]-4(1H)-pyrimidinone

1-[5-O-[(1,1-Dimethylethyl)diphenylsilyl]-β-D-arabinofuranosyl]-2-[(phenylmethyl)amino]-4(1H)-pyrimidinone

1-[5-O-[(1,1-Dimethylethyl)diphenylsilyl]-β-D-arabinofuranosyl]-2-(2-propen-1-ylamino)-4(1H)-pyrimidinone

2-(Butylamino)-1-[5-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-arabinofuranosyl]-4(1H)-pyrimidinone

1-[3,5-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-arabinofuranosyl]-2-(butylamino)-4(1H)-pyrimidinone

2-(Butylamino)-1-[5-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-arabinofuranosyl]-4(1H)-pyrimidinone

1-[3,5-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-arabinofuranosyl]-2-(methylamino)-4(1H)-pyrimidinone

1-[5-O-[(1,1-Dimethylethyl)dimethylsilyl]-β-D-arabinofuranosyl]-2-(methylamino)-4(1H)-pyrimidinone

Cytidine, 2′-deoxyadenylyl-(3′→5′)-(5S,5′S,6S)-5,6-dihydro-5′,6-cyclothymidylyl-(3′→5′)-2′-deoxy-

Cytidine, 2′-deoxyadenylyl-(3′→5′)-(5R,5′S,6S)-5,6-dihydro-5′,6-cyclothymidylyl-(3′→5′)-2′-deoxy-

Guanosine, 2′-deoxycytidylyl-(3′→5′)-(5S,5′S,6S)-5,6-dihydro-5′,6-cyclothymidylyl-(3′→5′)-2′-deoxy-

Guanosine, 2′-deoxycytidylyl-(3′→5′)-(5R,5′S,6S)-5,6-dihydro-5′,6-cyclothymidylyl-(3′→5′)-2′-deoxy-

(4S,4aS,5S,6R,7S,9R)-7-[[[Bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]oxy]decahydro-4-methyl-1,3-dioxo-6,9-epoxypyrimido[1,6-a]azepin-5-yl 4-oxopentanoate

(4S,4aS,5S,6S,7S,9R)-Decahydro-7-hydroxy-4-methyl-1,3-dioxo-6,9-epoxypyrimido[1,6-a]azepin-5-yl 4-oxopentanoate

(4S,4aS,5S,6R,7S,9R)-7-[[(1,1-Dimethylethyl)diphenylsilyl]oxy]decahydro-4-methyl-1,3-dioxo-6,9-epoxypyrimido[1,6-a]azepin-5-yl 4-oxopentanoate

(4S,4aS,5S,6R,7S,9R)-7-[[(1,1-Dimethylethyl)diphenylsilyl]oxy]hexahydro-5-hydroxy-4-methyl-6,9-epoxypyrimido[1,6-a]azepine-1,3(2H,4H)-dione