发明人周伟,郭海燕,赵玉洁. "Method for the Synthesis of Ethyl 7-chloro-5-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 114768679 B, 授权公告日 2022-10-25.
Yamamoto T, Lee S K, Kumar R. "A Process for Preparing High-Purity Ethyl 7-chloro-5-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. US Patent, US 9407232 B2, 2021-09-22.
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". Chemosphere, 2012, 1601, 9766-9770.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2019, 285, (4), 3656-3683.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 7-chloro-5-methylpyrazolo[1,5-a]pyrimidine-3-carboxylate Using HRMS and NMR". Talanta, 2021, 979, 8129-8151.