Lefèvre J P, Kowalski A, Nielsen H. "一种的合成方法" [P]. European Patent, EP 3352553 A1, 2022-07-06.
发明人唐晓军,杨光,朱建伟. "Method for the Synthesis of 7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one" [P]. 中国发明专利, 专利号 CN 112456871 B, 授权公告日 2022-05-13.
发明人冯建国,黄志刚,罗永刚. "A Process for Preparing High-Purity 7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one" [P]. 中国发明专利, 专利号 CN 114083382 A, 授权公告日 2022-06-04.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2019, 1056, (6), 5503-5520.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2023, 778, 6833-6851.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 7-Methylpyrimido[4,5-d]pyrimidin-4(3H)-one Using HRMS and NMR". Chemosphere, 2021, 1185, (11), 3844-3869.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2016, 575, (7), 8161-8166.