Synonyms: 1H-pyrazolo[3,4-d]pyrimidine-4-thiol, 6-methyl-1-phenyl-;4H-pyrazolo[3,4-d]pyrimidine-4-thione, 1,5-dihydro-6-methyl-1-phenyl-;6-Methyl-1-phenyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidine-4-thione;6-Methyl-1-phenyl-1H-pyrazolo[3,4-d]pyrimidine-4-thiol