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发明人钱学锋,赵玉洁,沈红梅. "A Process for Preparing High-Purity tert-Butyl (3-cyclopropyl-4-oxo-1,3,7-triazaspiro[4.4]non-1-en-2-yl)carbamate oxalate" [P]. 中国发明专利, 专利号 CN 109327718 A, 授权公告日 2017-02-22.
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