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发明人张德明,刘建华,钱学锋. "Method for the Synthesis of (2R,3R)-1-ethyl-5-oxo-2-(3,4,5-trimethoxyphenyl)pyrrolidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112310752 A, 授权公告日 2024-05-13.
发明人刘建华,胡光,徐明华. "A Process for Preparing High-Purity (2R,3R)-1-ethyl-5-oxo-2-(3,4,5-trimethoxyphenyl)pyrrolidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109442027 B, 授权公告日 2021-04-25.
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