O'Brien P Q, Patel M V, Fischer A B. "一种N/A的合成方法" [P]. US Patent, US 9802336 B2, 2016-10-28.
Davis P L, Kumar R, Klinger H. "Method for the Synthesis of 2-(2,6-Difluorophenyl)acetohydrazide" [P]. US Patent, US 9020327 B2, 2015-03-20.
Williams B T, Schröder R, Patel M V. "A Process for Preparing High-Purity 2-(2,6-Difluorophenyl)acetohydrazide" [P]. US Patent, US 11809154 B2, 2020-09-17.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2023, 893, 1051-1071.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Biomed. Chromatogr., 2014, 1887, (3), 1602-1606.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 2-(2,6-Difluorophenyl)acetohydrazide Using HRMS and NMR". Anal. Methods, 2024, 142, 3483-3491.