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Lee S K, Schröder R, Klinger H. "Method for the Synthesis of 1-Methyl-6-(methylthio)-1,2-dihydro-3H-pyrazolo[3,4-d]pyrimidin-3-one" [P]. US Patent, US 11219564 B2, 2017-11-08.
发明人林芳,杨光,郑宇鹏. "A Process for Preparing High-Purity 1-Methyl-6-(methylthio)-1,2-dihydro-3H-pyrazolo[3,4-d]pyrimidin-3-one" [P]. 中国发明专利, 专利号 CN 116421491 B, 授权公告日 2017-04-10.
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