发明人郭海燕,周伟,高志强. "Method for the Synthesis of 5-Methoxy-1-methyl-3-oxo-2,3-dihydro-1H-pyrazole-4-carbonitrile" [P]. 中国发明专利, 专利号 CN 117480638 B, 授权公告日 2022-11-03.
Lee S K, Fischer A B, Thompson G K. "A Process for Preparing High-Purity 5-Methoxy-1-methyl-3-oxo-2,3-dihydro-1H-pyrazole-4-carbonitrile" [P]. US Patent, US 11154333 B2, 2021-04-21.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2013, 206, (4), 5583-5587.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2022, 462, (4), 5605-5610.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 5-Methoxy-1-methyl-3-oxo-2,3-dihydro-1H-pyrazole-4-carbonitrile Using HRMS and NMR". Chemosphere, 2022, 92, (6), 663-691.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2019, 1308, (2), 8573-8597.