Nielsen H, Schröder R, Lefèvre J P. "一种的合成方法" [P]. European Patent, EP 3288928 A1, 2025-02-10.
Roberts E F, Davis P L, Klinger H. "Method for the Synthesis of 5,8-Dichloro-4-methyl-2H,3H,4H-pyridazino[4,5-b][1,4]oxazine" [P]. US Patent, US 9295216 B2, 2020-11-04.
Jørgensen K, Lefèvre J P, Kowalski A. "A Process for Preparing High-Purity 5,8-Dichloro-4-methyl-2H,3H,4H-pyridazino[4,5-b][1,4]oxazine" [P]. European Patent, EP 3462223 A1, 2020-06-05.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2022, 2435, (4), 6138-6165.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2017, 604, 7084-7095.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 5,8-Dichloro-4-methyl-2H,3H,4H-pyridazino[4,5-b][1,4]oxazine Using HRMS and NMR". Chemosphere, 2025, 352, (11), 6825-6852.