发明人郭海燕,钱学锋,郑宇鹏. "Method for the Synthesis of 2-Hydroxy-3,4-dihydro-2H-1,4-benzoxazin-3-one" [P]. 中国发明专利, 专利号 CN 112382782 B, 授权公告日 2019-09-01.
发明人王建平,周伟,冯建国. "A Process for Preparing High-Purity 2-Hydroxy-3,4-dihydro-2H-1,4-benzoxazin-3-one" [P]. 中国发明专利, 专利号 CN 108328622 B, 授权公告日 2016-06-22.
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