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发明人张德明,沈红梅,马晓峰. "Method for the Synthesis of 6-Methyl-3-nitro-2-oxo-1,2-dihydropyridin-4-yl butyrate" [P]. 中国发明专利, 专利号 CN 117257157 A, 授权公告日 2020-10-24.
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