Thompson G K, Roberts E F, Lee S K. "Method for the Synthesis of Ethyl 5,7-dichloropyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. US Patent, US 11121299 B2, 2015-07-27.
发明人郑宇鹏,马晓峰,罗永刚. "A Process for Preparing High-Purity Ethyl 5,7-dichloropyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 109993522 B, 授权公告日 2019-06-27.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2019, 477, 4001-4019.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2015, 1700, (6), 847-869.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 5,7-dichloropyrazolo[1,5-a]pyrimidine-3-carboxylate Using HRMS and NMR". Phytochemistry, 2010, 1254, (5), 5627-5652.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chromatographia, 2012, 2047, (11), 3531-3555.