N-[4-Methoxy-7-[(2R,4S)-tetrahydro-5,5-bis(hydroxymethyl)-4-(phenylmethoxy)-2-furanyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[7-[2-Deoxy-3-O-(phenylmethyl)-β-D-erythro-pentofuranosyl]-4-methoxy-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-3-O-(phenylmethyl)-β-D-erythro-pentofuranosyl]-4-methoxy-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[7-[2-Deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-β-D-erythro-pentofuranosyl]-4-methoxy-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4-methoxy-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[4-Chloro-7-[2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-4-C-(hydroxymethyl)-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[4-Chloro-7-[(2R,4S)-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]tetrahydro-5,5-bis(hydroxymethyl)-2-furanyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[4-Chloro-7-[2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide

N-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-4-chloro-7H-pyrrolo[2,3-d]pyrimidin-2-yl]-2,2-dimethylpropanamide