Lefèvre J P, Nielsen H, Johansson L. "一种的合成方法" [P]. European Patent, EP 3482036 A1, 2024-09-02.
Nielsen H, Mueller T C, Sørensen M. "Method for the Synthesis of Tert-butyl (3aR,7S,7aR)-7-methyl-5-(3-nitro-4-pyridyl)-2-oxo-4,6,7,7a-tetrahydro-3aH-oxazolo[4,5-c]pyridine-3-carboxylate" [P]. European Patent, EP 3943176 A1, 2022-09-08.
发明人何建平,罗永刚,郑宇鹏. "A Process for Preparing High-Purity Tert-butyl (3aR,7S,7aR)-7-methyl-5-(3-nitro-4-pyridyl)-2-oxo-4,6,7,7a-tetrahydro-3aH-oxazolo[4,5-c]pyridine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 116200101 B, 授权公告日 2022-09-14.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2018, 166, (1), 2438-2452.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2011, 1004, 4878-4908.