Kumar R, Mueller T, Yamamoto T. "Method for the Synthesis of (S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4,4-difluoropiperidine-2-carboxylic acid" [P]. US Patent, US 11490717 B2, 2015-11-02.
Rossi M, Nowak P, Mueller T C. "A Process for Preparing High-Purity (S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4,4-difluoropiperidine-2-carboxylic acid" [P]. European Patent, EP 3177311 A1, 2024-02-17.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2016, 275, (6), 4988-4995.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2018, 2307, (3), 1608-1619.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of (S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4,4-difluoropiperidine-2-carboxylic acid Using HRMS and NMR". Anal. Chem., 2022, 1772, (8), 340-364.