发明人钱学锋,朱建伟,杨光. "Method for the Synthesis of 4-((2-Methoxyethyl)carbamoyl)-1-methyl-1H-pyrazole-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114165176 B, 授权公告日 2015-03-11.
发明人何建平,孙丽萍,周伟. "A Process for Preparing High-Purity 4-((2-Methoxyethyl)carbamoyl)-1-methyl-1H-pyrazole-5-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115953994 B, 授权公告日 2016-12-10.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2023, 2273, (10), 7785-7809.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2020, 210, 5851-5876.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 4-((2-Methoxyethyl)carbamoyl)-1-methyl-1H-pyrazole-5-carboxylic acid Using HRMS and NMR". Anal. Chim. Acta, 2021, 255, (11), 999-1002.