O'Brien P Q, Stevens L M, Hughes D C. "Method for the Synthesis of 5,6-difluoroquinazolin-2-amine" [P]. US Patent, US 11004188 B2, 2019-07-21.
Schröder R, Martínez F, Rossi M. "A Process for Preparing High-Purity 5,6-difluoroquinazolin-2-amine" [P]. European Patent, EP 3539430 A1, 2019-11-05.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2016, 1481, (6), 3272-3295.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2024, 1997, (7), 1821-1829.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 5,6-difluoroquinazolin-2-amine Using HRMS and NMR". J. Sep. Sci., 2021, 320, (2), 3854-3863.