Thymidine, 5′-S-2-benzothiazolyl-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-thio-

Thymidine, 5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-[(1-methyl-1H-tetrazol-5-yl)sulfonyl]-

Thymidine, 3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-S-(1-methyl-1H-tetrazol-5-yl)-5′-thio-

Thymidine, 5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-[(1-phenyl-1H-tetrazol-5-yl)sulfonyl]-

Thymidine, 3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-S-(1-phenyl-1H-tetrazol-5-yl)-5′-thio-

N-[2-[[(2R,3S,5R)-2-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-5-(3,4-dihydro-5-methyl-2,4-dioxo-1(2H)-pyrimidinyl)-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]tetrahydro-2-furanyl]oxy]ethyl]-2,2,2-trifluoroacetamide