发明人韩伟,张德明,郭海燕. "Method for the Synthesis of 2-(4-Cyano-2-(difluoromethyl)-5-ethylphenyl)acetic acid" [P]. 中国发明专利, 专利号 CN 117404677 A, 授权公告日 2024-01-04.
发明人何建平,韩伟,钱学锋. "A Process for Preparing High-Purity 2-(4-Cyano-2-(difluoromethyl)-5-ethylphenyl)acetic acid" [P]. 中国发明专利, 专利号 CN 117860648 B, 授权公告日 2025-12-28.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2014, 1019, 9196-9225.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2014, 2083, (7), 9578-9590.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 2-(4-Cyano-2-(difluoromethyl)-5-ethylphenyl)acetic acid Using HRMS and NMR". Talanta, 2019, 387, (8), 6964-6968.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2021, 1606, 4625-4639.