2′-Deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[3-[[[1,1-dimethyl-2-[(2,2,2-trifluoroacetyl)amino]ethyl]dithio]methoxy]-1-propyn-1-yl]-3′-O-2-propen-1-yluridine

5-[3-[[4-(2-Aminoethyl)-2-nitrophenyl]methoxy]-1-propyn-1-yl]-2′-deoxy-N-[(dimethylamino)methylene]-3′-O-[[(1,1-dimethylethyl)dithio]methyl]cytidine 5′-(tetrahydrogen triphosphate)

5-[3-[[2-Amino-4-[2-[(2,2,2-trifluoroacetyl)amino]ethyl]phenyl]methoxy]-1-propyn-1-yl]-2′-deoxy-N-[(dimethylamino)methylene]-3′-O-[[(1,1-dimethylethyl)dithio]methyl]cytidine

2′-Deoxy-N-[(dimethylamino)methylene]-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-O-[[(1,1-dimethylethyl)dithio]methyl]-5-[3-[[2-nitro-4-[2-[(2,2,2-trifluoroacetyl)amino]ethyl]phenyl]methoxy]-1-propyn-1-yl]cytidine

3′-O-[[(Methoxymethyl)dithio]methyl]thymidine 5′-(tetrahydrogen triphosphate)

3′-O-[[(Methoxymethyl)dithio]methyl]thymidine

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-3′-O-[[(methoxymethyl)dithio]methyl]thymidine

3′-O-[1-[(1,1-Dimethylethyl)dithio]ethyl]thymidine 5′-(tetrahydrogen triphosphate)

3′-O-[1-[(1,1-Dimethylethyl)dithio]ethyl]thymidine

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-3′-O-[1-[(1,1-dimethylethyl)dithio]ethyl]thymidine

5′-O-[(1,1-Dimethylethyl)dimethylsilyl]-3′-O-[1-(ethylthio)ethyl]thymidine

4-Cycloocten-1-yl N-[2-[[[[3-[4-amino-7-[2-deoxy-3-O-[[(1,1-dimethylethyl)dithio]methyl]-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]oxy]methyl]dithio]-2-methylpropyl]carbamate

5-[3-[[(2-Amino-1,1-dimethylethyl)dithio]methoxy]-1-propyn-1-yl]-7-[2-deoxy-3-O-[[(1,1-dimethylethyl)dithio]methyl]-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

N′-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-5-iodo-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-N,N-dimethylmethanimidamide

(3aS,4S,6aR)-N-[2-[[[[3-[2-Amino-7-[2-deoxy-3-O-[[(1,1-dimethylethyl)dithio]methyl]-5-O-[hydroxy[[hydroxy(phosphonooxy)phosphinyl]oxy]phosphinyl]-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]oxy]methyl]dithio]-2-methylpropyl]hexahydro-2-oxo-1H-thieno[3..

5-[3-[[[2-[[5-[(4-Boronobenzoyl)amino]-1-oxopentyl]amino]-1,1-dimethylethyl]dithio]methoxy]-1-propyn-1-yl]-2′-deoxy-3′-O-[[(1,1-dimethylethyl)dithio]methyl]cytidine 5′-(tetrahydrogen triphosphate)

2′-Deoxy-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-5-iodo-N-[(dimethylamino)methylene]cytidine