发明人韩伟,郑宇鹏,徐明华. "Method for the Synthesis of (R)-Ethyl 2-methylene-5-oxohexahydro-1H-pyrrolizine-7a-carboxylate" [P]. 中国发明专利, 专利号 CN 109508139 A, 授权公告日 2019-09-02.
发明人徐明华,王建平,孙丽萍. "A Process for Preparing High-Purity (R)-Ethyl 2-methylene-5-oxohexahydro-1H-pyrrolizine-7a-carboxylate" [P]. 中国发明专利, 专利号 CN 117610433 B, 授权公告日 2020-12-20.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Environ. Sci. Technol., 2016, 324, (7), 5682-5688.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2011, 1982, (12), 949-973.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of (R)-Ethyl 2-methylene-5-oxohexahydro-1H-pyrrolizine-7a-carboxylate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2023, 1980, 4441-4453.