发明人林芳,何建平,唐晓军. "一种左炔诺孕酮EP杂质M的合成方法" [P]. 中国发明专利, 专利号 CN 114545941 A, 授权公告日 2016-12-16.
Björnsson E, Johansson L, Nielsen H. "Method for the Synthesis of Levonorgestrel EP Impurity M" [P]. European Patent, EP 3379752 A1, 2022-06-18.
发明人胡光,沈红梅,唐晓军. "A Process for Preparing High-Purity Levonorgestrel EP Impurity M" [P]. 中国发明专利, 专利号 CN 108427757 B, 授权公告日 2023-08-12.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of 左炔诺孕酮EP杂质M in Pharmaceutical Formulations". J. Sep. Sci., 2024, 283, 2506-2536.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左炔诺孕酮EP杂质M as an Impurity". Molecules, 2016, 852, 5285-5304.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of Levonorgestrel EP Impurity M Using HRMS and NMR". J. Agric. Food Chem., 2025, 2188, 8602-8612.