发明人郑宇鹏,林芳,罗永刚. "一种4-(二氟甲氧基)-3-羟基苯甲酸的合成方法" [P]. 中国发明专利, 专利号 CN 115806192 A, 授权公告日 2025-08-26.
发明人张德明,黄志刚,朱建伟. "Method for the Synthesis of 4-(Difluoromethoxy)-3-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 112366423 B, 授权公告日 2024-08-20.
发明人钱学锋,何建平,杨光. "A Process for Preparing High-Purity 4-(Difluoromethoxy)-3-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 116086897 A, 授权公告日 2018-08-04.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of 4-(二氟甲氧基)-3-羟基苯甲酸 in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2011, 1519, 283-288.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 4-(二氟甲氧基)-3-羟基苯甲酸 as an Impurity". Molecules, 2020, 297, 5565-5578.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Difluoromethoxy)-3-hydroxybenzoic acid Using HRMS and NMR". Biomed. Chromatogr., 2024, 1364, 3959-3970.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate 4-(二氟甲氧基)-3-羟基苯甲酸 Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2016, 2389, 9700-9710.