Björnsson E, Jørgensen K, Nowak P. "Method for the Synthesis of 6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one" [P]. European Patent, EP 3766266 A1, 2015-04-07.
发明人唐晓军,孙丽萍,林芳. "A Process for Preparing High-Purity 6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one" [P]. 中国发明专利, 专利号 CN 112471186 B, 授权公告日 2022-03-21.
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". Biomed. Chromatogr., 2024, 479, 7118-7140.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2022, 450, 4792-4798.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of 6-Ethyl-3-methyl-4-phenylisoxazolo[3,4-d]pyridazin-7(6H)-one Using HRMS and NMR". J. Chromatogr. A, 2017, 247, (8), 7910-7925.