发明人何建平,林芳,周伟. "一种乌帕替尼杂质9的合成方法" [P]. 中国发明专利, 专利号 CN 114894653 A, 授权公告日 2021-08-17.
Patel M V, Kumar R, Hughes D C. "Method for the Synthesis of Upadacitinib Impurity 9" [P]. US Patent, US 10622128 B2, 2018-06-02.
Schröder R, Jørgensen K, Nielsen H. "A Process for Preparing High-Purity Upadacitinib Impurity 9" [P]. European Patent, EP 3038068 A1, 2018-12-07.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of 乌帕替尼杂质9 in Pharmaceutical Formulations". J. Sep. Sci., 2019, 232, (5), 2681-2696.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of 乌帕替尼杂质9 as an Impurity". Talanta, 2024, 593, (7), 3963-3990.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Upadacitinib Impurity 9 Using HRMS and NMR". Sci. Total Environ., 2018, 1393, (9), 5613-5633.