发明人孙丽萍,胡光,朱建伟. "一种左炔诺孕酮杂质N1的合成方法" [P]. 中国发明专利, 专利号 CN 115969041 A, 授权公告日 2025-06-19.
发明人黄志刚,郑宇鹏,孙丽萍. "Method for the Synthesis of Levonorgestrel Impurity N1" [P]. 中国发明专利, 专利号 CN 109789600 B, 授权公告日 2023-01-02.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of 左炔诺孕酮杂质N1 in Pharmaceutical Formulations". Biomed. Chromatogr., 2025, 144, 6157-6187.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左炔诺孕酮杂质N1 as an Impurity". J. Agric. Food Chem., 2024, 1412, 5574-5579.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of Levonorgestrel Impurity N1 Using HRMS and NMR". J. Sep. Sci., 2011, 997, 5188-5216.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate 左炔诺孕酮杂质N1 Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2019, 479, (5), 2913-2920.