Fischer A B, Hughes D C, Kumar R. "Method for the Synthesis of Montelukast Impurity 21" [P]. US Patent, US 9339955 B2, 2021-07-08.
Schröder R, Nielsen H, Jørgensen K. "A Process for Preparing High-Purity Montelukast Impurity 21" [P]. European Patent, EP 3322023 A1, 2016-05-08.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2024, 666, (8), 6518-6537.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2011, 301, (8), 4338-4362.
Brown R C, Davis S M. "Identification and Structural Characterization of a Novel Degradation Product of Montelukast Impurity 21 Using HRMS and NMR". Food Chem., 2017, 1676, (4), 7750-7779.