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发明人郑宇鹏,冯建国,黄志刚. "A Process for Preparing High-Purity Methyl 3-(4-methylbenzenesulfonyl)-2-oxo-2H-chromene-6-carboxylate" [P]. 中国发明专利, 专利号 CN 112442463 A, 授权公告日 2023-11-23.
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