Nowak P, Schröder R, Nielsen H. "Method for the Synthesis of 4-Amino-5-cyano-2-hydroxy-3-methyl-benzoic acid ethyl ester" [P]. European Patent, EP 3373640 A1, 2025-08-01.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2019, 1483, 5715-5732.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2013, 2269, (8), 9626-9656.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 4-Amino-5-cyano-2-hydroxy-3-methyl-benzoic acid ethyl ester Using HRMS and NMR". J. Agric. Food Chem., 2012, 1405, (6), 8434-8449.
Xu M, Hu Y, Zhou D. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2018, 2057, 9848-9851.