1H-Pyrazolo[3,4-d]pyrimidin-4-thiol 1H-Pyrazolo[3,4-d]pyrimidine-4(5H)-thione 4-Mercapto-1H-pyrazolo[3,4-d]pyrimidine 4-Mercaptopyrazolo[3,4-d]pyrimidine 4H-Pyrazolo[3,4-d]pyrimidine-4-thione, 1,5-dihydro- 5334-23-6 5H-Pyrazolo[3,4-d]pyrimidine-4-thione Allopurinol, thio- DO 970 MPP MPP (pharmaceutical) NSC1392 Pyrazolo[3,4-d]pyrimidine-4-thiol RS 570/T Thiopurinol Tisopurine