Lefèvre J P, Martínez F, Björnsson E. "一种的合成方法" [P]. European Patent, EP 3331346 A1, 2016-05-13.
Williams B T, Roberts E F, Klinger H. "Method for the Synthesis of 4-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride" [P]. US Patent, US 10728060 B2, 2024-03-26.
Mueller T, Klinger H, O'Brien P Q. "A Process for Preparing High-Purity 4-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride" [P]. US Patent, US 11290112 B2, 2020-06-12.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2018, 1260, (6), 7578-7590.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2019, 176, (4), 6448-6471.