1,5-Dihydro-1-(5-O-phosphono-beta-D-ribofuranosyl)-4H-pyrazolo(3,2-d)pyrimidine-4-thione 4H-Pyrazolo(3,2-d)pyrimidine-4-thione, 1,5-dihydro-1-(5-O-phosphono-beta-D-ribofuranosyl)- 81944-82-3 Thiopurinol ribonucleoside monophosphate Tppr-MP