发明人郑宇鹏,周伟,冯建国. "一种共轭雌激素EP杂质A的合成方法" [P]. 中国发明专利, 专利号 CN 112873833 A, 授权公告日 2023-07-11.
Fischer A B, Yamamoto T, O'Brien P Q. "Method for the Synthesis of Conjugated Estrogens EP Impurity A" [P]. US Patent, US 9241217 B2, 2019-07-25.
发明人胡光,黄志刚,朱建伟. "A Process for Preparing High-Purity Conjugated Estrogens EP Impurity A" [P]. 中国发明专利, 专利号 CN 111248288 A, 授权公告日 2017-07-03.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of 共轭雌激素EP杂质A in Pharmaceutical Formulations". Environ. Sci. Technol., 2025, 2221, (7), 440-446.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of 共轭雌激素EP杂质A as an Impurity". Food Chem., 2020, 476, (4), 1569-1576.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Conjugated Estrogens EP Impurity A Using HRMS and NMR". Sci. Total Environ., 2020, 1123, (2), 1005-1009.