发明人马晓峰,郭海燕,何建平. "Method for the Synthesis of methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate" [P]. 中国发明专利, 专利号 CN 113508545 A, 授权公告日 2017-03-09.
发明人何建平,徐明华,郭海燕. "A Process for Preparing High-Purity methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate" [P]. 中国发明专利, 专利号 CN 113699509 A, 授权公告日 2015-07-25.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate in Pharmaceutical Formulations". J. Nat. Prod., 2012, 1185, 8347-8364.
Zhang Y, Li Q, Chen T. "A Stability-Indicating HPLC Method for the Separation and Quantification of methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate as an Impurity". Biomed. Chromatogr., 2018, 208, 4871-4893.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2013, 2390, (7), 2438-2444.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate methyl 1-(2-ethoxy-2-oxoethyl)-6-(2-furyl)-3-methyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2014, 1885, (7), 2291-2314.