Anderson J P, Thompson G K, Klinger H. "一种的合成方法" [P]. US Patent, US 9305326 B2, 2015-07-19.
Hughes D C, Schröder R, Patel M V. "Method for the Synthesis of 4,5-Diamino-2-ethyl-1-methyl-1H-pyrazol-3(2H)-one" [P]. US Patent, US 10449662 B2, 2017-11-03.
Patel M V, Park J H, Yamamoto T. "A Process for Preparing High-Purity 4,5-Diamino-2-ethyl-1-methyl-1H-pyrazol-3(2H)-one" [P]. US Patent, US 10821256 B2, 2024-08-27.
参考文献 Literature
Martinez C, Lopez D R. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2020, 1604, 5679-5701.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2019, 1049, (8), 5421-5427.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 4,5-Diamino-2-ethyl-1-methyl-1H-pyrazol-3(2H)-one Using HRMS and NMR". J. Chromatogr. A, 2017, 1007, (4), 5299-5323.