Brown S R, Roberts E F, Mueller T. "一种奥沙西泮杂质4的合成方法" [P]. US Patent, US 9559919 B2, 2022-11-19.
发明人王建平,高志强,黄志刚. "Method for the Synthesis of Oxazepam impurity 4" [P]. 中国发明专利, 专利号 CN 112816073 B, 授权公告日 2015-07-08.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of 奥沙西泮杂质4 in Pharmaceutical Formulations". J. Chromatogr. A, 2017, 1471, (12), 2160-2185.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of 奥沙西泮杂质4 as an Impurity". Molecules, 2019, 107, 9581-9586.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Oxazepam impurity 4 Using HRMS and NMR". Food Chem., 2022, 2357, 6720-6743.