发明人沈红梅,唐晓军,何建平. "Method for the Synthesis of N-(6,7-Dihydro-5H-pyrano[2,3-d]pyrimidin-2-yl)cyanamide" [P]. 中国发明专利, 专利号 CN 110212279 B, 授权公告日 2018-02-21.
发明人马晓峰,钱学锋,黄志刚. "A Process for Preparing High-Purity N-(6,7-Dihydro-5H-pyrano[2,3-d]pyrimidin-2-yl)cyanamide" [P]. 中国发明专利, 专利号 CN 113781997 A, 授权公告日 2022-06-16.
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