Brown S R, Stevens L M, Schröder R. "Method for the Synthesis of Pyrimido[4,5-d]pyridazine" [P]. US Patent, US 10960007 B2, 2018-05-19.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2023, 1051, (4), 6810-6817.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2012, 1872, (8), 3562-3571.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Pyrimido[4,5-d]pyridazine Using HRMS and NMR". Chromatographia, 2022, 591, 947-962.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2021, 396, 8715-8723.