发明人王建平,钱学锋,徐明华. "Method for the Synthesis of 6-(4-Nitro-1H-pyrazol-1-yl)-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117018998 B, 授权公告日 2022-07-22.
发明人刘建华,何建平,张德明. "A Process for Preparing High-Purity 6-(4-Nitro-1H-pyrazol-1-yl)-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114276601 A, 授权公告日 2016-07-28.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2013, 1670, (12), 6726-6734.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2025, 1935, 7127-7138.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 6-(4-Nitro-1H-pyrazol-1-yl)-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid Using HRMS and NMR". Anal. Methods, 2015, 1151, (7), 7642-7663.