Fischer A B, Patel M V, Anderson J P. "Method for the Synthesis of Ethyl 4-amino-5-ethyl-1H-pyrazole-3-carboxylate" [P]. US Patent, US 11296264 B2, 2018-03-13.
发明人高志强,张德明,钱学锋. "A Process for Preparing High-Purity Ethyl 4-amino-5-ethyl-1H-pyrazole-3-carboxylate" [P]. 中国发明专利, 专利号 CN 111035777 A, 授权公告日 2024-04-15.
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". Chromatographia, 2016, 927, (4), 3629-3634.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2018, 1219, 1365-1370.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Ethyl 4-amino-5-ethyl-1H-pyrazole-3-carboxylate Using HRMS and NMR". Anal. Methods, 2016, 847, (1), 9896-9921.