发明人刘建华,唐晓军,马晓峰. "Method for the Synthesis of Methyl 2-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-7-carboxylate" [P]. 中国发明专利, 专利号 CN 111709689 A, 授权公告日 2015-04-09.
Kowalski A, Björnsson E, Jørgensen K. "A Process for Preparing High-Purity Methyl 2-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-7-carboxylate" [P]. European Patent, EP 3068806 A1, 2016-10-23.
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