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发明人孙丽萍,胡光,冯建国. "A Process for Preparing High-Purity 3-Amino-1-oxo-1,5,6,7,8,8a-hexahydroindolizine-2-carbonitrile" [P]. 中国发明专利, 专利号 CN 112307024 A, 授权公告日 2019-01-21.
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