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发明人郭海燕,胡光,韩伟. "A Process for Preparing High-Purity Ethyl 5-methyl-6-oxa-5-azaspiro[3.4]octane-7-carboxylate" [P]. 中国发明专利, 专利号 CN 111925390 A, 授权公告日 2025-11-26.
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