Johnson M A, Park J H, Chen K W. "Method for the Synthesis of 1H-pyrazolo[4,3-c]pyridine-6-carboxylic acid, 1-acetyl-, methyl ester" [P]. US Patent, US 10647585 B2, 2020-11-26.
Davis P L, O'Brien P Q, Johnson M A. "A Process for Preparing High-Purity 1H-pyrazolo[4,3-c]pyridine-6-carboxylic acid, 1-acetyl-, methyl ester" [P]. US Patent, US 11097359 B2, 2015-11-25.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2018, 1200, 7056-7064.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2015, 1628, 679-701.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 1H-pyrazolo[4,3-c]pyridine-6-carboxylic acid, 1-acetyl-, methyl ester Using HRMS and NMR". Molecules, 2012, 2075, 9361-9390.
Jensen P, Larsen A M, Olsen K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Agric. Food Chem., 2015, 2017, (8), 3673-3687.