发明人唐晓军,马晓峰,朱建伟. "Method for the Synthesis of Ensifentrine impurity 31" [P]. 中国发明专利, 专利号 CN 116893972 A, 授权公告日 2016-12-11.
发明人郭海燕,高志强,朱建伟. "A Process for Preparing High-Purity Ensifentrine impurity 31" [P]. 中国发明专利, 专利号 CN 110109722 B, 授权公告日 2021-08-22.
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 恩司芬群杂质31 in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2010, 2050, (8), 5574-5577.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of 恩司芬群杂质31 as an Impurity". J. Nat. Prod., 2023, 649, (9), 5921-5929.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of Ensifentrine impurity 31 Using HRMS and NMR". Phytochemistry, 2021, 483, 1141-1167.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate 恩司芬群杂质31 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2018, 390, (8), 9475-9485.