发明人罗永刚,刘建华,钱学锋. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 109966824 A, 授权公告日 2019-10-01.
发明人唐晓军,周伟,林芳. "Method for the Synthesis of 4-(Hydroxy(methyl)phosphoryl)-2-(methylamino)butanoic acid" [P]. 中国发明专利, 专利号 CN 113439201 A, 授权公告日 2022-10-07.
发明人黄志刚,陈志强,赵玉洁. "A Process for Preparing High-Purity 4-(Hydroxy(methyl)phosphoryl)-2-(methylamino)butanoic acid" [P]. 中国发明专利, 专利号 CN 115100119 A, 授权公告日 2019-06-22.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". J. Nat. Prod., 2019, 104, 1089-1098.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Sci. Total Environ., 2023, 2147, 8704-8734.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Hydroxy(methyl)phosphoryl)-2-(methylamino)butanoic acid Using HRMS and NMR". Chemosphere, 2017, 408, (12), 7479-7509.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". J. Agric. Food Chem., 2024, 2048, (6), 12-42.