发明人杨光,高志强,刘建华. "Method for the Synthesis of Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 114249812 A, 授权公告日 2023-02-14.
发明人徐明华,韩伟,刘建华. "A Process for Preparing High-Purity Methyl 7-chloro-2-ethyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 108747432 B, 授权公告日 2017-06-02.
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