Fischer A B, Hughes D C, Klinger H. "一种的合成方法" [P]. US Patent, US 11460490 B2, 2016-09-27.
Anderson J P, Chen K W, Johnson M A. "Method for the Synthesis of 2,6-Dimethyl-2,6-dihydro-7H-pyrazolo[3,4-d]pyridazin-7-one" [P]. US Patent, US 9301547 B2, 2023-10-02.
发明人林芳,赵玉洁,王建平. "A Process for Preparing High-Purity 2,6-Dimethyl-2,6-dihydro-7H-pyrazolo[3,4-d]pyridazin-7-one" [P]. 中国发明专利, 专利号 CN 108902346 B, 授权公告日 2022-01-15.
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". J. Agric. Food Chem., 2024, 394, (7), 8784-8809.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2017, 847, (6), 2826-2844.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of 2,6-Dimethyl-2,6-dihydro-7H-pyrazolo[3,4-d]pyridazin-7-one Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2017, 1932, 3041-3044.