发明人马晓峰,冯建国,张德明. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 115134881 A, 授权公告日 2016-07-26.
Mueller T C, Johansson L, Sørensen M. "Method for the Synthesis of 1,3-Dimethyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. European Patent, EP 3913124 A1, 2025-02-02.
发明人赵玉洁,冯建国,孙丽萍. "A Process for Preparing High-Purity 1,3-Dimethyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one" [P]. 中国发明专利, 专利号 CN 115925765 A, 授权公告日 2016-09-18.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2010, 1299, (2), 9884-9893.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2010, 1492, (11), 4105-4130.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 1,3-Dimethyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one Using HRMS and NMR". Chemosphere, 2016, 447, (11), 3143-3169.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2019, 754, (11), 3841-3855.