Park J H, Thompson G K, Yamamoto T. "Method for the Synthesis of 4,6,7-Trimethyl-2-oxo-2H-chromene-3-carboxylic acid" [P]. US Patent, US 11789555 B2, 2023-07-12.
发明人朱建伟,郑宇鹏,郭海燕. "A Process for Preparing High-Purity 4,6,7-Trimethyl-2-oxo-2H-chromene-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110246176 A, 授权公告日 2017-02-17.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2010, 2258, (2), 9929-9958.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2019, 185, (12), 4786-4801.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 4,6,7-Trimethyl-2-oxo-2H-chromene-3-carboxylic acid Using HRMS and NMR". Biomed. Chromatogr., 2016, 639, (7), 5527-5551.