Klinger H, Williams B T, Davis P L. "Method for the Synthesis of 2-(5-Amino-4-carbamoyl-1H-pyrazol-3-yl)acetic acid" [P]. US Patent, US 9522534 B2, 2015-06-01.
Johnson M A, Chen K W, Thompson G K. "A Process for Preparing High-Purity 2-(5-Amino-4-carbamoyl-1H-pyrazol-3-yl)acetic acid" [P]. US Patent, US 10647399 B2, 2021-12-11.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2010, 2472, 3703-3712.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2013, 1918, (7), 9504-9512.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 2-(5-Amino-4-carbamoyl-1H-pyrazol-3-yl)acetic acid Using HRMS and NMR". J. Chromatogr. A, 2011, 152, (5), 8893-8920.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2017, 495, 3087-3114.