发明人李文辉,冯建国,沈红梅. "Method for the Synthesis of 6-(Ethylthio)pyrazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116478826 B, 授权公告日 2022-05-09.
发明人周伟,赵玉洁,李文辉. "A Process for Preparing High-Purity 6-(Ethylthio)pyrazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117557562 A, 授权公告日 2024-02-16.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2010, 402, 6504-6514.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2021, 521, (8), 6106-6109.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 6-(Ethylthio)pyrazine-2-carboxylic acid Using HRMS and NMR". Anal. Chim. Acta, 2023, 2344, (7), 4085-4113.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Phytochemistry, 2012, 2287, (4), 4020-4023.