6H-Pyrazolo[3,4-d]pyrimidin-6-one,1,5-dihydro-4-(methylthio); 4-methylsulfanyl-1,7-dihydro-pyrazolo[3,4-d]pyrimidin-6-one; 4-(methylthio)-1H-pyrazolo[3,4-d]pyrimidin-6-ol; 4-Methylmercapto-1,7-dihydro-pyrazolo[3,4-d]pyrimidin-6-on
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