发明人郑宇鹏,陈志强,赵玉洁. "Method for the Synthesis of 2-(hydroxymethyl)-5-methyl-spiro[6H-pyrazolo[1,5-a]pyrazine-7,1'-cyclopropane]-4-one" [P]. 中国发明专利, 专利号 CN 114055152 A, 授权公告日 2020-12-06.
发明人林芳,高志强,刘建华. "A Process for Preparing High-Purity 2-(hydroxymethyl)-5-methyl-spiro[6H-pyrazolo[1,5-a]pyrazine-7,1'-cyclopropane]-4-one" [P]. 中国发明专利, 专利号 CN 110638218 A, 授权公告日 2021-08-14.
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