Roberts E F, O'Brien P Q, Chen K W. "一种的合成方法" [P]. US Patent, US 11442433 B2, 2015-12-19.
Lefèvre J P, Nowak P, Martínez F. "Method for the Synthesis of Bis(4-(2-hydroxyethyl)piperazine-1-carboximidamide), sulfuric acid" [P]. European Patent, EP 3941493 A1, 2016-08-28.
Brown S R, Kumar R, Davis P L. "A Process for Preparing High-Purity Bis(4-(2-hydroxyethyl)piperazine-1-carboximidamide), sulfuric acid" [P]. US Patent, US 11716276 B2, 2018-07-05.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chim. Acta, 2013, 943, (1), 3919-3940.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Chromatogr. A, 2011, 947, 6004-6025.
Garcia M, Rodriguez P. "Identification and Structural Characterization of a Novel Degradation Product of Bis(4-(2-hydroxyethyl)piperazine-1-carboximidamide), sulfuric acid Using HRMS and NMR". Molecules, 2022, 1581, (8), 7024-7034.
Zhou X P, Huang L, Wu G. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2015, 1526, (6), 426-438.