发明人郭海燕,朱建伟,陈志强. "一种左西孟旦杂质N1的合成方法" [P]. 中国发明专利, 专利号 CN 108955040 A, 授权公告日 2023-07-12.
发明人罗永刚,郑宇鹏,郭海燕. "Method for the Synthesis of Levosimendan Impurity N1" [P]. 中国发明专利, 专利号 CN 108485339 B, 授权公告日 2017-09-02.
发明人杨光,朱建伟,罗永刚. "A Process for Preparing High-Purity Levosimendan Impurity N1" [P]. 中国发明专利, 专利号 CN 108061937 A, 授权公告日 2020-11-08.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of 左西孟旦杂质N1 in Pharmaceutical Formulations". J. Nat. Prod., 2014, 2472, 6207-6235.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左西孟旦杂质N1 as an Impurity". Anal. Methods, 2014, 2342, (11), 6258-6285.
Mueller T, Schmidt R K. "Identification and Structural Characterization of a Novel Degradation Product of Levosimendan Impurity N1 Using HRMS and NMR". Chromatographia, 2010, 750, 6150-6154.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate 左西孟旦杂质N1 Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2022, 1726, 8122-8143.