Lee S K, Stevens L M, Park J H. "一种N/A的合成方法" [P]. US Patent, US 10282241 B2, 2019-09-07.
Yamamoto T, Roberts E F, Stevens L M. "Method for the Synthesis of 5-Fluoro-3-methoxypyrazin-2-amine" [P]. US Patent, US 9952639 B2, 2018-07-21.
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 N/A in Pharmaceutical Formulations". Chemosphere, 2024, 1118, 3534-3563.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Talanta, 2020, 2471, (7), 3039-3068.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 5-Fluoro-3-methoxypyrazin-2-amine Using HRMS and NMR". J. Pharm. Biomed. Anal., 2021, 1168, 3799-3814.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2022, 841, 3087-3097.