发明人王建平,周伟,何建平. "Method for the Synthesis of Pyrimido[5,4-d]pyrimidin-2(1H)-one" [P]. 中国发明专利, 专利号 CN 113004869 A, 授权公告日 2017-12-15.
发明人张德明,陈志强,刘建华. "A Process for Preparing High-Purity Pyrimido[5,4-d]pyrimidin-2(1H)-one" [P]. 中国发明专利, 专利号 CN 114295660 B, 授权公告日 2019-10-08.
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