4H-Pyrazolo(3,4-d)pyrimidin-4-one, 6-amino-1,5-dihydro-1-beta-D-ribofuranosyl- 6-Amino-1-beta-D-ribofuranosylpyrazolo(3,4-d)pyrimidin-4-one 6-Aminoallopurinol riboside 85426-74-0