Nowak P, Martínez F, Schröder R. "Method for the Synthesis of ethyl 4-amino-1-methyl-1{H}-pyrazole-3-carboxylate,HCl" [P]. European Patent, EP 3674234 A1, 2020-04-22.
Yamamoto T, Patel M V, Thompson G K. "A Process for Preparing High-Purity ethyl 4-amino-1-methyl-1{H}-pyrazole-3-carboxylate,HCl" [P]. US Patent, US 10330659 B2, 2019-10-26.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of ethyl 4-amino-1-methyl-1{H}-pyrazole-3-carboxylate,HCl in Pharmaceutical Formulations". Anal. Methods, 2012, 1793, (12), 6705-6723.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of ethyl 4-amino-1-methyl-1{H}-pyrazole-3-carboxylate,HCl as an Impurity". Anal. Chem., 2024, 2101, (10), 9530-9539.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of ethyl 4-amino-1-methyl-1{H}-pyrazole-3-carboxylate,HCl Using HRMS and NMR". J. Nat. Prod., 2013, 812, (2), 732-739.