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发明人林芳,孙丽萍,赵玉洁. "A Process for Preparing High-Purity 4-(8-Oxo-1-azaspiro[4.4]non-6-en-1-yl)benzonitrile" [P]. 中国发明专利, 专利号 CN 113862970 A, 授权公告日 2025-10-08.
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