(R)-1-C-(7-Amino-1H-pyrazolo(4,3-d)pyrimidin-3-yl)-1,4-anhydro-2-deoxy-D-erythro-pentitol 2'-Deoxyformycin A 40627-14-3 96893-70-8 D-erythro-Pentitol, 1-C-(7-amino-1H-pyrazolo(4,3-d)pyrimidin-3-yl)-1,4-anhydro-2-deoxy-, (R)-