发明人朱建伟,李文辉,罗永刚. "Method for the Synthesis of 6-Chloro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-8-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115192089 A, 授权公告日 2022-04-08.
发明人韩伟,赵玉洁,朱建伟. "A Process for Preparing High-Purity 6-Chloro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-8-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109250925 A, 授权公告日 2019-11-24.
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