1,5-Dihydro-1-(5-O-phosphono-beta-D-ribofuranosyl)-4H-pyrazolo(3,4-d)pyrimidin-4-one 26753-52-6 26753-53-7 4H-Pyrazolo(3,4-d)pyrimidin-4-one, 1,5-dihydro-1-(5-O-phosphono-beta-D-ribofuranosyl)- Allopurinol riboside 5'-monophosphate Hppr-MP Purinol ribonucleoside 5'-monophosphate