Fischer A B, Williams B T, Schröder R. "一种的合成方法" [P]. US Patent, US 10331118 B2, 2024-03-22.
发明人张德明,冯建国,钱学锋. "Method for the Synthesis of 1,6-dihydropyrazolo[3,4-c]pyrazol-4-amine" [P]. 中国发明专利, 专利号 CN 111620767 B, 授权公告日 2018-06-25.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2011, 694, (7), 341-357.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2020, 360, (8), 5310-5329.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 1,6-dihydropyrazolo[3,4-c]pyrazol-4-amine Using HRMS and NMR". Molecules, 2012, 2045, (5), 9806-9828.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2014, 1690, 57-67.