1,5-Dihydro-1-beta-D-ribofuranosyl-4H-pyrazolo(3,4-d)pyrimidin-4-one 16220-07-8 4-Hydroxy(3,4-d)pyrazolopyrimidine riboside 4-Hydroxy-1beta-D-ribofuranosylpyrazolo(3,4-d)pyrimidine 4H-Pyrazolo(3,4-d)pyrimidin-4-one, 1,5-dihydro-1-beta-D-ribofuranosyl- Allopurinol ribonucleoside Allopurinol riboside Allopurinol-1-ribonucleoside NSC 138437