3H-Imidazo[2,1-i]purine, 3-[2-deoxy-2-fluoro-3,5-bis-O-[(R)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with 4-[(1R,2S,3S)-2,3-bis(hydroxymethyl)cyclobutyl]-2-pyridinecarboxamide

3H-Imidazo[2,1-i]purine, 3-[2-deoxy-2-fluoro-3,5-bis-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with 4-[(1R,2S,3S)-2,3-bis(hydroxymethyl)cyclobutyl]-2-pyridinecarboxamide

3H-Imidazo[2,1-i]purine, 3-[2-deoxy-2-fluoro-5-O-[(R)-hydroxymercaptophosphinyl]-3-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with 4-[(1R,2S,3S)-2,3-bis(hydroxymethyl)cyclobutyl]-2-pyridinecarboxamide

3H-Imidazo[2,1-i]purine, 3-[2-deoxy-2-fluoro-3-O-[(R)-hydroxymercaptophosphinyl]-5-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with 4-[(1R,2S,3S)-2,3-bis(hydroxymethyl)cyclobutyl]-2-pyridinecarboxamide