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发明人郭海燕,韩伟,徐明华. "Method for the Synthesis of 2-Oxo-1-oxa-spiro[4.5]decane-3,4-dicarboxylic acid diethyl ester" [P]. 中国发明专利, 专利号 CN 108916610 A, 授权公告日 2020-07-19.
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