发明人孙丽萍,钱学锋,杨光. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 111639929 A, 授权公告日 2016-07-24.
Fischer A B, Klinger H, O'Brien P Q. "Method for the Synthesis of 1,4-Dimethyl-1H-pyrazolo[3,4-d]pyrimidine" [P]. US Patent, US 9802218 B2, 2019-06-03.
发明人王建平,冯建国,朱建伟. "A Process for Preparing High-Purity 1,4-Dimethyl-1H-pyrazolo[3,4-d]pyrimidine" [P]. 中国发明专利, 专利号 CN 115891240 A, 授权公告日 2024-11-16.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Sci. Total Environ., 2010, 325, (7), 9214-9230.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2019, 547, 8428-8447.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 1,4-Dimethyl-1H-pyrazolo[3,4-d]pyrimidine Using HRMS and NMR". Molecules, 2018, 349, 4257-4281.