Williams B T, Roberts E F, Johnson M A. "Method for the Synthesis of Upadacitinib Impurity 48" [P]. US Patent, US 11130728 B2, 2020-10-25.
Brown S R, Kumar R, Johnson M A. "A Process for Preparing High-Purity Upadacitinib Impurity 48" [P]. US Patent, US 10717587 B2, 2018-08-08.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of 乌帕替尼杂质48 in Pharmaceutical Formulations". J. Nat. Prod., 2022, 1542, 3672-3675.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 乌帕替尼杂质48 as an Impurity". J. Pharm. Biomed. Anal., 2021, 1962, 9550-9553.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of Upadacitinib Impurity 48 Using HRMS and NMR". Food Chem., 2023, 1184, (10), 1595-1620.
Brown R C, Davis S M. "Forced Degradation Studies to Evaluate 乌帕替尼杂质48 Profile in Drug Substances According to ICH Guidelines". Anal. Chim. Acta, 2012, 1817, (5), 1639-1650.