发明人钱学锋,郭海燕,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112796775 A, 授权公告日 2015-09-08.
Lefèvre J P, Johansson L, Martínez F. "Method for the Synthesis of N-Ethyl-2-imino-1-(2-methoxyethyl)-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide" [P]. European Patent, EP 3802092 A1, 2020-10-23.
Lefèvre J P, Johansson L, Mueller T C. "A Process for Preparing High-Purity N-Ethyl-2-imino-1-(2-methoxyethyl)-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide" [P]. European Patent, EP 3732104 A1, 2025-06-06.
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 in Pharmaceutical Formulations". J. Nat. Prod., 2019, 1693, 5412-5435.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2021, 305, (8), 4121-4147.