Anderson J P, Brown S R, Stevens L M. "Method for the Synthesis of 1-(2-Hydroxyethyl)-5-(propan-2-yl)-1h-pyrazole-4-carboxylic acid" [P]. US Patent, US 11906469 B2, 2022-07-01.
Schröder R, Kumar R, Stevens L M. "A Process for Preparing High-Purity 1-(2-Hydroxyethyl)-5-(propan-2-yl)-1h-pyrazole-4-carboxylic acid" [P]. US Patent, US 11496749 B2, 2023-01-20.
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". Phytochemistry, 2016, 2426, (10), 3419-3434.
Xu M, Hu Y, Zhou D. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2015, 589, (10), 4042-4057.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 1-(2-Hydroxyethyl)-5-(propan-2-yl)-1h-pyrazole-4-carboxylic acid Using HRMS and NMR". Chemosphere, 2015, 1859, (10), 8029-8057.