Chen K W, Thompson G K, Hughes D C. "Method for the Synthesis of Ketoprofen Impurity 38" [P]. US Patent, US 10552979 B2, 2015-02-23.
Nowak P, Martínez F, Johansson L. "A Process for Preparing High-Purity Ketoprofen Impurity 38" [P]. European Patent, EP 3905667 A1, 2022-02-13.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2017, 452, (9), 7815-7839.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2013, 436, 8175-8189.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of Ketoprofen Impurity 38 Using HRMS and NMR". Molecules, 2020, 451, (9), 8928-8957.