Synonym: 1 H -Pyrazolo(3,4-d)pyrimidin-4-ol, 4-Hydroxypyrazolo(3,4-d)pyrimidine, 4-Hydroxypyrazolo[3,4-d]pyrimidine, HPP CAS Number: 315-30-0 Empirical Formula (Hill Notation): C5H4N4O Molecular Weight: 136.11 EC Number: 2006-250-9 MDL Number: MFCD00599413 PubChem...