Jørgensen K, Lefèvre J P, Rossi M. "一种5-[4-(difluoromethoxy)phenyl]thiophene-2-carboxylic acid的合成方法" [P]. European Patent, EP 3561477 A1, 2018-06-23.
Yamamoto T, Stevens L M, Park J H. "Method for the Synthesis of 5-[4-(difluoromethoxy)phenyl]thiophene-2-carboxylic acid" [P]. US Patent, US 10478340 B2, 2018-04-21.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of 5-[4-(difluoromethoxy)phenyl]thiophene-2-carboxylic acid in Pharmaceutical Formulations". J. Chromatogr. A, 2014, 303, 1391-1413.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of 5-[4-(difluoromethoxy)phenyl]thiophene-2-carboxylic acid as an Impurity". Anal. Methods, 2018, 1733, (4), 9148-9151.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 5-[4-(difluoromethoxy)phenyl]thiophene-2-carboxylic acid Using HRMS and NMR". Phytochemistry, 2017, 1634, (2), 1250-1276.