Hughes D C, Patel M V, Fischer A B. "一种的合成方法" [P]. US Patent, US 10825753 B2, 2023-12-24.
发明人马晓峰,孙丽萍,何建平. "Method for the Synthesis of 7-Methyl-1-(pyridazin-3-yl)-1,7-diazaspiro[4.4]nonane" [P]. 中国发明专利, 专利号 CN 117631894 A, 授权公告日 2020-10-16.
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". J. Nat. Prod., 2024, 2349, 7804-7826.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2020, 2370, (7), 9968-9995.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of 7-Methyl-1-(pyridazin-3-yl)-1,7-diazaspiro[4.4]nonane Using HRMS and NMR". Anal. Chim. Acta, 2023, 2346, (1), 1644-1659.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2011, 1961, (1), 4028-4031.