Chen K W, O'Brien P Q, Brown S R. "Method for the Synthesis of rac-(2R,3R)-1-ethyl-6-oxo-2-(pyridin-4-yl)piperidine-3-carboxylic acid" [P]. US Patent, US 10700292 B2, 2024-02-16.
发明人李文辉,郭海燕,何建平. "A Process for Preparing High-Purity rac-(2R,3R)-1-ethyl-6-oxo-2-(pyridin-4-yl)piperidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109521148 A, 授权公告日 2019-08-12.
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