发明人冯建国,王建平,黄志刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 110324854 A, 授权公告日 2020-05-22.
发明人周伟,韩伟,陈志强. "Method for the Synthesis of 2-(6-Methyl-4-oxo-4,5-dihydro-1h-pyrazolo[3,4-d]pyrimidin-1-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 109379447 A, 授权公告日 2020-05-01.
发明人何建平,黄志刚,钱学锋. "A Process for Preparing High-Purity 2-(6-Methyl-4-oxo-4,5-dihydro-1h-pyrazolo[3,4-d]pyrimidin-1-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 116062636 A, 授权公告日 2021-02-25.
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