Park J H, Stevens L M, Patel M V. "一种的合成方法" [P]. US Patent, US 10707498 B2, 2017-05-22.
发明人孙丽萍,罗永刚,朱建伟. "Method for the Synthesis of 1-Ethyl-4-nitro-1h-pyrazole-3-carbohydrazide" [P]. 中国发明专利, 专利号 CN 108199637 B, 授权公告日 2025-07-14.
发明人高志强,王建平,周伟. "A Process for Preparing High-Purity 1-Ethyl-4-nitro-1h-pyrazole-3-carbohydrazide" [P]. 中国发明专利, 专利号 CN 110429412 A, 授权公告日 2016-04-13.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2020, 2456, (7), 7953-7965.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2013, 1737, 7828-7852.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 1-Ethyl-4-nitro-1h-pyrazole-3-carbohydrazide Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2013, 1404, (10), 9862-9867.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2024, 1401, (11), 5950-5956.