发明人黄志刚,钱学锋,郭海燕. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 111885229 A, 授权公告日 2020-03-12.
Johansson L, Jørgensen K, Schröder R. "Method for the Synthesis of 3-methyl-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. European Patent, EP 3604100 A1, 2022-08-02.
发明人唐晓军,何建平,杨光. "A Process for Preparing High-Purity 3-methyl-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. 中国发明专利, 专利号 CN 115505112 A, 授权公告日 2021-09-04.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2010, 2314, 7567-7584.
Zhou X P, Huang L, Wu G. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2020, 311, 8542-8570.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 3-methyl-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-7-one Using HRMS and NMR". Chromatographia, 2016, 1405, (6), 8827-8846.