Park J H, Williams B T, Thompson G K. "Method for the Synthesis of 7-Aminothieno[2,3-b]pyrazine-6-carboxylic acid" [P]. US Patent, US 11021367 B2, 2022-05-10.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2017, 1546, (10), 5349-5355.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2016, 2407, (9), 9537-9548.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 7-Aminothieno[2,3-b]pyrazine-6-carboxylic acid Using HRMS and NMR". Anal. Chem., 2016, 1313, (10), 9630-9647.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Food Chem., 2022, 1450, 910-931.