Stevens L M, O'Brien P Q, Kumar R. "一种的合成方法" [P]. US Patent, US 11885229 B2, 2020-09-08.
发明人韩伟,孙丽萍,罗永刚. "Method for the Synthesis of 4-(Methylthio)-1H-pyrazolo[3,4-d]pyrimidine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 117431679 B, 授权公告日 2022-08-19.
发明人郑宇鹏,朱建伟,钱学锋. "A Process for Preparing High-Purity 4-(Methylthio)-1H-pyrazolo[3,4-d]pyrimidine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 108016659 B, 授权公告日 2015-04-13.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2014, 1834, (11), 1987-1990.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2013, 1842, 5290-5298.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 4-(Methylthio)-1H-pyrazolo[3,4-d]pyrimidine-3-carbonitrile Using HRMS and NMR". J. Sep. Sci., 2019, 1069, 3435-3459.