Hughes D C, Fischer A B, Roberts E F. "一种的合成方法" [P]. US Patent, US 9291907 B2, 2016-03-25.
Klinger H, Anderson J P, Brown S R. "Method for the Synthesis of 4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,2,5-oxadiazol-3-amine" [P]. US Patent, US 11577346 B2, 2023-09-01.
Johnson M A, Thompson G K, Mueller T. "A Process for Preparing High-Purity 4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,2,5-oxadiazol-3-amine" [P]. US Patent, US 11886210 B2, 2022-09-03.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2019, 1577, (4), 5940-5948.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2021, 333, (8), 705-724.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 4-(5-Methyl-1,2,4-oxadiazol-3-yl)-1,2,5-oxadiazol-3-amine Using HRMS and NMR". Anal. Methods, 2016, 594, 5097-5109.