Nowak P, Nielsen H, Sørensen M. "一种的合成方法" [P]. European Patent, EP 3656593 A1, 2018-02-13.
Jørgensen K, Nowak P, Mueller T C. "Method for the Synthesis of 2-(3,3-Difluorocyclobutyl)propanoic acid" [P]. European Patent, EP 3234758 A1, 2022-07-10.
Hughes D C, O'Brien P Q, Mueller T. "A Process for Preparing High-Purity 2-(3,3-Difluorocyclobutyl)propanoic acid" [P]. US Patent, US 10863200 B2, 2023-09-04.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chromatographia, 2023, 1748, (3), 7308-7335.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2011, 366, 9471-9497.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 2-(3,3-Difluorocyclobutyl)propanoic acid Using HRMS and NMR". Anal. Chim. Acta, 2024, 1128, (6), 1446-1452.
Chen X Y, Liu M, Zhao W Q. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2022, 2167, (10), 2707-2721.