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发明人高志强,刘建华,韩伟. "A Process for Preparing High-Purity 3-(1,3-Dioxo-2-azaspiro[4.4]nonan-2-yl)propanoic acid" [P]. 中国发明专利, 专利号 CN 116950537 B, 授权公告日 2020-07-17.
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