发明人张德明,唐晓军,罗永刚. "Method for the Synthesis of rac-(2R,3S)-4-ethyl-3-(1-methyl-1H-pyrazol-5-yl)-5-oxomorpholine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115449765 A, 授权公告日 2019-05-20.
发明人冯建国,徐明华,沈红梅. "A Process for Preparing High-Purity rac-(2R,3S)-4-ethyl-3-(1-methyl-1H-pyrazol-5-yl)-5-oxomorpholine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108349158 B, 授权公告日 2022-01-17.
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