发明人王建平,韩伟,罗永刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113877360 A, 授权公告日 2015-06-23.
发明人孙丽萍,赵玉洁,李文辉. "Method for the Synthesis of 2-Hydroxy-2-(5-oxo-2-phenylpyrazolidin-1-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 117059270 B, 授权公告日 2020-01-04.
发明人朱建伟,胡光,郭海燕. "A Process for Preparing High-Purity 2-Hydroxy-2-(5-oxo-2-phenylpyrazolidin-1-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 111605497 A, 授权公告日 2015-09-13.
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