2-Aminoformycin 5,7-Diamino-3-(beta-ribofuranosyl)pyrazolo(4,3-d)pyrimidine 97782-03-1 D-Ribitol, 1,4-anhydro-1-C-(5,7-diamino-1H-pyrazolo(4,3-d)pyrimidin-3-yl)-, (S)-