发明人黄志刚,陈志强,冯建国. "Method for the Synthesis of 4-Amino-6-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109713755 B, 授权公告日 2021-01-26.
Stevens L M, Klinger H, Fischer A B. "A Process for Preparing High-Purity 4-Amino-6-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid" [P]. US Patent, US 11210244 B2, 2017-09-16.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2021, 584, 9202-9223.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2013, 898, (9), 5328-5347.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-Amino-6-methyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylic acid Using HRMS and NMR". J. Sep. Sci., 2017, 1632, (9), 1129-1145.