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发明人刘建华,陈志强,黄志刚. "Method for the Synthesis of 2-(3-bromo-1-methyl-7-oxo-pyrazolo[4,3-d]pyrimidin-6-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 112460353 A, 授权公告日 2020-11-11.
发明人冯建国,徐明华,陈志强. "A Process for Preparing High-Purity 2-(3-bromo-1-methyl-7-oxo-pyrazolo[4,3-d]pyrimidin-6-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 112005565 B, 授权公告日 2020-07-14.
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