发明人林芳,朱建伟,何建平. "Method for the Synthesis of 6,7-Dichloro-3,4-dihydro-2H-1,4-benzoxazin-3-one" [P]. 中国发明专利, 专利号 CN 116643626 B, 授权公告日 2017-02-28.
发明人孙丽萍,胡光,罗永刚. "A Process for Preparing High-Purity 6,7-Dichloro-3,4-dihydro-2H-1,4-benzoxazin-3-one" [P]. 中国发明专利, 专利号 CN 115534620 B, 授权公告日 2019-05-13.
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