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发明人林芳,周伟,李文辉. "A Process for Preparing High-Purity 3-Oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride" [P]. 中国发明专利, 专利号 CN 111324822 B, 授权公告日 2025-02-25.
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