发明人赵玉洁,刘建华,张德明. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 113907401 A, 授权公告日 2023-03-21.
Williams B T, Brown S R, Kumar R. "Method for the Synthesis of 5-(6-Oxo-1,6-dihydropyridazin-3-yl)thiophene-2-sulfonyl chloride" [P]. US Patent, US 11269707 B2, 2023-07-08.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". J. Sep. Sci., 2019, 842, 2621-2635.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". J. Nat. Prod., 2012, 1819, (4), 2379-2406.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 5-(6-Oxo-1,6-dihydropyridazin-3-yl)thiophene-2-sulfonyl chloride Using HRMS and NMR". J. Pharm. Biomed. Anal., 2014, 2245, (8), 7268-7298.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2010, 456, (5), 560-589.