发明人刘建华,赵玉洁,胡光. "Method for the Synthesis of (S)-5-Oxopiperazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114532423 A, 授权公告日 2021-02-06.
发明人黄志刚,何建平,郑宇鹏. "A Process for Preparing High-Purity (S)-5-Oxopiperazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108635581 A, 授权公告日 2015-02-23.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2020, 1081, 5182-5199.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2010, 439, 8243-8253.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of (S)-5-Oxopiperazine-2-carboxylic acid Using HRMS and NMR". Food Chem., 2021, 323, (3), 5406-5414.