Björnsson E, Johansson L, Rossi M. "Method for the Synthesis of Levonorgestrel EP Impurity G" [P]. European Patent, EP 3460709 A1, 2023-05-13.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of 左炔诺孕酮EP杂质G in Pharmaceutical Formulations". Anal. Methods, 2014, 1265, (10), 4211-4235.
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G as an Impurity". J. Nat. Prod., 2015, 260, 6124-6132.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of Levonorgestrel EP Impurity G Using HRMS and NMR". J. Pharm. Biomed. Anal., 2016, 2092, 9063-9086.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate 左炔诺孕酮EP杂质G Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2014, 823, 8039-8057.