N-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-6-phenyl-3H-pyrrolo[2,3-d]pyrimidin-2-yl]-2-methylpropanamide

N-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,7-dihydro-4-oxo-6-phenyl-3H-pyrrolo[2,3-d]pyrimidin-2-yl]-2-methylpropanamide

2-Amino-7-(2-deoxy-β-D-erythro-pentofuranosyl)-3,7-dihydro-6-phenyl-4H-pyrrolo[2,3-d]pyrimidin-4-one

N-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,7-dihydro-5,6-diiodo-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-2-yl]-2-methylpropanamide

2-Amino-3,7-dihydro-6-iodo-7-β-D-ribofuranosyl-4H-pyrrolo[2,3-d]pyrimidin-4-one

Methyl 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-1,2-dihydro-4-[(4-methoxybenzoyl)amino]-2-oxo-5-pyrimidinecarboxylate

Methyl 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-1,2-dihydro-4-[(4-methoxybenzoyl)amino]-2-oxo-5-pyrimidinecarboxylate