发明人刘建华,何建平,徐明华. "一种己酮可可碱杂质N3的合成方法" [P]. 中国发明专利, 专利号 CN 114311002 A, 授权公告日 2017-05-11.
发明人郭海燕,韩伟,朱建伟. "Method for the Synthesis of Pentoxifylline Impurity N3" [P]. 中国发明专利, 专利号 CN 112848253 A, 授权公告日 2018-02-21.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of 己酮可可碱杂质N3 in Pharmaceutical Formulations". J. Sep. Sci., 2010, 1816, (3), 650-677.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of 己酮可可碱杂质N3 as an Impurity". Rapid Commun. Mass Spectrom., 2021, 935, (8), 7964-7980.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of Pentoxifylline Impurity N3 Using HRMS and NMR". J. Chromatogr. A, 2019, 1926, 7642-7667.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate 己酮可可碱杂质N3 Profile in Drug Substances According to ICH Guidelines". Food Chem., 2023, 480, (11), 9286-9289.