发明人郭海燕,罗永刚,周伟. "Method for the Synthesis of 1-(2-(3,4-Dimethoxyphenyl)pyrazolo[1,5-a]pyrazin-4-yl)piperidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109315856 A, 授权公告日 2025-10-16.
发明人杨光,刘建华,李文辉. "A Process for Preparing High-Purity 1-(2-(3,4-Dimethoxyphenyl)pyrazolo[1,5-a]pyrazin-4-yl)piperidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109720079 A, 授权公告日 2015-04-14.
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". Molecules, 2011, 278, 4961-4969.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2011, 2177, (9), 8210-8218.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2-(3,4-Dimethoxyphenyl)pyrazolo[1,5-a]pyrazin-4-yl)piperidine-4-carboxylic acid Using HRMS and NMR". Environ. Sci. Technol., 2015, 757, (6), 1946-1965.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2024, 1849, (1), 3949-3978.