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发明人徐明华,马晓峰,罗永刚. "A Process for Preparing High-Purity α,α-Dimethyl-2-oxo-1-pyrrolidineacetic acid methyl ester" [P]. 中国发明专利, 专利号 CN 109588324 B, 授权公告日 2023-09-27.
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