发明人杨光,徐明华,郭海燕. "Method for the Synthesis of (2E)-3-[(3-Oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)carbamoyl]prop-2-enoic acid" [P]. 中国发明专利, 专利号 CN 112487328 A, 授权公告日 2022-07-28.
发明人沈红梅,刘建华,孙丽萍. "A Process for Preparing High-Purity (2E)-3-[(3-Oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)carbamoyl]prop-2-enoic acid" [P]. 中国发明专利, 专利号 CN 108057871 B, 授权公告日 2018-07-01.
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