发明人杨光,高志强,钱学锋. "Method for the Synthesis of 2-(4-Oxo-1-phenyl-1,4-dihydro-5h-pyrazolo[3,4-d]pyrimidin-5-yl)acetohydrazide" [P]. 中国发明专利, 专利号 CN 116834819 A, 授权公告日 2019-06-15.
发明人沈红梅,张德明,钱学锋. "A Process for Preparing High-Purity 2-(4-Oxo-1-phenyl-1,4-dihydro-5h-pyrazolo[3,4-d]pyrimidin-5-yl)acetohydrazide" [P]. 中国发明专利, 专利号 CN 116485652 A, 授权公告日 2017-09-09.
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