Stevens L M, Brown S R, Anderson J P. "一种多沙普仑杂质5的合成方法" [P]. US Patent, US 9264989 B2, 2024-07-09.
Mueller T C, Nowak P, Sørensen M. "Method for the Synthesis of Doxapram Impurity 5" [P]. European Patent, EP 3770830 A1, 2024-09-10.
Björnsson E, Schröder R, Nowak P. "A Process for Preparing High-Purity Doxapram Impurity 5" [P]. European Patent, EP 3328858 A1, 2021-01-08.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of 多沙普仑杂质5 in Pharmaceutical Formulations". Anal. Chim. Acta, 2023, 1824, (8), 1885-1896.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of 多沙普仑杂质5 as an Impurity". Anal. Chem., 2011, 2056, 8037-8040.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of Doxapram Impurity 5 Using HRMS and NMR". Talanta, 2015, 465, (6), 5643-5646.