发明人林芳,高志强,唐晓军. "Method for the Synthesis of Ethyl 2-amino-6-(hydroxymethyl)-8-oxo-4-(pyridin-3-yl)-4,8-dihydropyrano[3,2-b]pyran-3-carboxylate" [P]. 中国发明专利, 专利号 CN 109944887 A, 授权公告日 2018-11-18.
发明人郭海燕,杨光,马晓峰. "A Process for Preparing High-Purity Ethyl 2-amino-6-(hydroxymethyl)-8-oxo-4-(pyridin-3-yl)-4,8-dihydropyrano[3,2-b]pyran-3-carboxylate" [P]. 中国发明专利, 专利号 CN 115609124 B, 授权公告日 2017-10-02.
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