Lefèvre J P, Rossi M, Mueller T C. "Method for the Synthesis of 1H-Pyrazolo[3,4-c]pyridazin-3(2H)-one" [P]. European Patent, EP 3150432 A1, 2022-07-03.
发明人孙丽萍,林芳,唐晓军. "A Process for Preparing High-Purity 1H-Pyrazolo[3,4-c]pyridazin-3(2H)-one" [P]. 中国发明专利, 专利号 CN 110934800 B, 授权公告日 2025-04-05.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Nat. Prod., 2018, 787, 3008-3019.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2018, 633, 7248-7276.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of 1H-Pyrazolo[3,4-c]pyridazin-3(2H)-one Using HRMS and NMR". J. Pharm. Biomed. Anal., 2025, 1096, 3815-3837.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2019, 1890, (11), 9195-9203.