5-Ethynyl-7-(2-C-ethynyl-4-C-fluoro-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

4-Amino-7-(2-C-ethynyl-4-C-fluoro-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carboxamide

4-Amino-7-(2-C-ethynyl-4-C-fluoro-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

4-Amino-7-[3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-C-ethynyl-4-C-fluoro-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

1,3-Bis(1,1-dimethylethyl) 2-[5-cyano-7-[3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-C-ethynyl-4-C-fluoro-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[5-cyano-7-[5-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-2-C-ethynyl-4-C-fluoro-5-iodo-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[5-cyano-7-(5-deoxy-2-C-ethynyl-4-C-fluoro-5-iodo-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]imidodicarbonate

4-Amino-7-(5-deoxy-2-C-ethynyl-5-iodo-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

4-Chloro-7-(5-deoxy-2-C-ethynyl-5-iodo-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

4-Chloro-7-(2-C-ethynyl-β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

7-[3,5-Bis-O-[(2,4-dichlorophenyl)methyl]-2-C-ethynyl-β-D-ribofuranosyl]-4-chloro-7H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile

7-[3,5-Bis-O-[(2,4-dichlorophenyl)methyl]-2-C-ethynyl-β-D-ribofuranosyl]-4-chloro-5-iodo-7H-pyrrolo[2,3-d]pyrimidine