发明人刘建华,徐明华,钱学锋. "Method for the Synthesis of 5-Ethyl-1-(6-hydroxypyridazin-3-yl)-1H-pyrazole-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117553131 B, 授权公告日 2023-01-16.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2019, 732, (2), 4898-4923.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2020, 171, 2922-2928.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 5-Ethyl-1-(6-hydroxypyridazin-3-yl)-1H-pyrazole-4-carboxylic acid Using HRMS and NMR". J. Nat. Prod., 2024, 1486, (10), 9337-9355.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2023, 836, (2), 6771-6779.