发明人张德明,马晓峰,王建平. "Method for the Synthesis of Ethyl 4-methyl-3-oxo-3,4-dihydro-2h-1,4-benzoxazine-6-carboxylate" [P]. 中国发明专利, 专利号 CN 115180350 B, 授权公告日 2025-07-15.
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