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发明人郑宇鹏,林芳,罗永刚. "Method for the Synthesis of Ethyl 3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 114348247 A, 授权公告日 2021-01-15.
发明人赵玉洁,李文辉,徐明华. "A Process for Preparing High-Purity Ethyl 3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 110726446 A, 授权公告日 2021-04-07.
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