发明人刘建华,王建平,陈志强. "Method for the Synthesis of (S)-3-bromo-7-methyl-6,7-dihydropyrazolo[1,5-a]pyrazin-4(5H)-one" [P]. 中国发明专利, 专利号 CN 109136697 A, 授权公告日 2018-02-26.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2019, 362, (9), 851-868.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2012, 880, (5), 932-945.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of (S)-3-bromo-7-methyl-6,7-dihydropyrazolo[1,5-a]pyrazin-4(5H)-one Using HRMS and NMR". Biomed. Chromatogr., 2012, 91, (11), 7108-7123.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Talanta, 2012, 2308, (8), 5884-5887.