Park J H, Brown S R, Williams B T. "一种的合成方法" [P]. US Patent, US 9344522 B2, 2018-03-01.
Thompson G K, Park J H, Anderson J P. "Method for the Synthesis of 4,5-Diamino-1-ethyl-2-methyl-1H-pyrazol-3(2H)-one" [P]. US Patent, US 10655488 B2, 2017-11-18.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2013, 495, (2), 5140-5165.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2022, 1618, (10), 5076-5106.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of 4,5-Diamino-1-ethyl-2-methyl-1H-pyrazol-3(2H)-one Using HRMS and NMR". Biomed. Chromatogr., 2023, 2061, 6953-6970.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2017, 246, (8), 9398-9410.