Martínez F, Mueller T C, Johansson L. "一种的合成方法" [P]. European Patent, EP 3381988 A1, 2017-01-19.
Mueller T C, Kowalski A, Jørgensen K. "Method for the Synthesis of Guaifenesin Impurity 1" [P]. European Patent, EP 3414800 A1, 2018-11-12.
发明人王建平,冯建国,郭海燕. "A Process for Preparing High-Purity Guaifenesin Impurity 1" [P]. 中国发明专利, 专利号 CN 114591832 A, 授权公告日 2018-06-28.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2022, 754, (1), 4864-4881.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2010, 1338, 2973-2986.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Guaifenesin Impurity 1 Using HRMS and NMR". Food Chem., 2021, 1938, (5), 5253-5275.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2016, 1982, 1178-1184.