发明人罗永刚,王建平,何建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 110741718 A, 授权公告日 2016-09-04.
发明人罗永刚,孙丽萍,高志强. "Method for the Synthesis of 4-Hydroxy-7H-pyrrolo[2,3-c]pyridazine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116587149 A, 授权公告日 2019-08-11.
发明人黄志刚,孙丽萍,刘建华. "A Process for Preparing High-Purity 4-Hydroxy-7H-pyrrolo[2,3-c]pyridazine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116343816 B, 授权公告日 2016-02-04.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2016, 1123, 93-112.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2013, 1933, (9), 745-764.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 4-Hydroxy-7H-pyrrolo[2,3-c]pyridazine-6-carboxylic acid Using HRMS and NMR". J. Chromatogr. A, 2020, 968, (4), 492-495.