发明人杨光,何建平,陈志强. "Method for the Synthesis of Methyl 2-((4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)thio)propanoate" [P]. 中国发明专利, 专利号 CN 111952181 B, 授权公告日 2017-06-03.
发明人黄志刚,王建平,李文辉. "A Process for Preparing High-Purity Methyl 2-((4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl)thio)propanoate" [P]. 中国发明专利, 专利号 CN 113179242 B, 授权公告日 2024-05-01.
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