发明人王建平,郭海燕,孙丽萍. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115651163 A, 授权公告日 2022-09-14.
发明人唐晓军,冯建国,马晓峰. "Method for the Synthesis of Methyl 5-oxo-6-(pyridin-2-ylamino)-1,2,3,5-tetrahydroindolizine-8-carboxylate" [P]. 中国发明专利, 专利号 CN 114276898 A, 授权公告日 2021-01-26.
发明人刘建华,杨光,高志强. "A Process for Preparing High-Purity Methyl 5-oxo-6-(pyridin-2-ylamino)-1,2,3,5-tetrahydroindolizine-8-carboxylate" [P]. 中国发明专利, 专利号 CN 115972293 A, 授权公告日 2022-03-11.
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