Martínez F, Rossi M, Nielsen H. "Method for the Synthesis of 3,5-Dihydroxy-4-methylbenzoic acid hemihydrate" [P]. European Patent, EP 3005389 A1, 2017-05-13.
Johansson L, Nowak P, Nielsen H. "A Process for Preparing High-Purity 3,5-Dihydroxy-4-methylbenzoic acid hemihydrate" [P]. European Patent, EP 3565626 A1, 2025-06-02.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2013, 728, (4), 8905-8927.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2016, 627, (10), 702-727.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 3,5-Dihydroxy-4-methylbenzoic acid hemihydrate Using HRMS and NMR". Biomed. Chromatogr., 2019, 2108, (1), 4841-4868.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2025, 1994, 8662-8689.