Park J H, Anderson J P, Lee S K. "一种的合成方法" [P]. US Patent, US 9457838 B2, 2016-01-10.
O'Brien P Q, Klinger H, Thompson G K. "Method for the Synthesis of Leuprorelin Impurity 21" [P]. US Patent, US 10873574 B2, 2025-03-15.
发明人郑宇鹏,沈红梅,徐明华. "A Process for Preparing High-Purity Leuprorelin Impurity 21" [P]. 中国发明专利, 专利号 CN 110796972 B, 授权公告日 2021-10-05.
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 in Pharmaceutical Formulations". Biomed. Chromatogr., 2013, 171, (7), 1534-1555.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Pharm. Biomed. Anal., 2016, 1388, (8), 2201-2221.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of Leuprorelin Impurity 21 Using HRMS and NMR". J. Agric. Food Chem., 2019, 2069, 2671-2686.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2012, 2034, 217-226.