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发明人刘建华,赵玉洁,何建平. "A Process for Preparing High-Purity 4-(2,5-Difluorobenzoyl)-8-methyl-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113783049 B, 授权公告日 2018-06-03.
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