Björnsson E, Mueller T C, Martínez F. "一种的合成方法" [P]. European Patent, EP 3032677 A1, 2019-03-28.
Mueller T C, Martínez F, Rossi M. "Method for the Synthesis of 4,6,7-Trimethyl-1h-indole-2-carboxylic acid" [P]. European Patent, EP 3305621 A1, 2017-11-05.
发明人李文辉,张德明,林芳. "A Process for Preparing High-Purity 4,6,7-Trimethyl-1h-indole-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115903342 B, 授权公告日 2022-07-09.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2018, 1941, (1), 3506-3519.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2014, 1897, 4430-4445.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 4,6,7-Trimethyl-1h-indole-2-carboxylic acid Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2023, 1255, 2856-2862.
Wang L, Li J, Zhang H. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2017, 209, 6837-6844.