2-Deoxy-7-.beta.-D-ribofuranosyl-3-deazaguanine 4H-Imidazo[4,5-c]pyridin-4-one, 6-amino-3,5-dihydro-3-.beta.-D-ribofuranosyl- 58459-36-2 7-.beta.-D-rib-3-deaza-dG AIDS-001897 AIDS001897