发明人赵玉洁,刘建华,孙丽萍. "Method for the Synthesis of Norepinephrine Impurity 21" [P]. 中国发明专利, 专利号 CN 112415386 A, 授权公告日 2023-03-19.
发明人朱建伟,张德明,黄志刚. "A Process for Preparing High-Purity Norepinephrine Impurity 21" [P]. 中国发明专利, 专利号 CN 113333995 A, 授权公告日 2022-05-15.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of 去甲肾上腺素杂质21 in Pharmaceutical Formulations". Chromatographia, 2021, 90, (8), 9838-9843.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of 去甲肾上腺素杂质21 as an Impurity". Rapid Commun. Mass Spectrom., 2012, 2159, (7), 3505-3516.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Norepinephrine Impurity 21 Using HRMS and NMR". Talanta, 2018, 189, (4), 3409-3439.
Fischer P, Wagner E. "Forced Degradation Studies to Evaluate 去甲肾上腺素杂质21 Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2021, 931, (6), 3577-3592.