Hughes D C, Fischer A B, Yamamoto T. "Method for the Synthesis of Ethyl 5-bromo-8-oxo-8H-pyrido[1,2-b]pyridazine-7-carboxylate" [P]. US Patent, US 9132360 B2, 2025-05-15.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2010, 1700, 8753-8760.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2023, 1509, (9), 3536-3555.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5-bromo-8-oxo-8H-pyrido[1,2-b]pyridazine-7-carboxylate Using HRMS and NMR". Molecules, 2018, 2411, (9), 5503-5521.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2018, 2410, (11), 4315-4332.