Isolation and characterization of a degradation product in leflunomide and a validated selective stability-indicating HPLC–UV method for their quantification
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J Pharm Anal. 2015 Jun; 5(3): 207–212.
Rapid Stability Indicating HPLC Method for the Analysis of Leflunomide and Its Related Impurities in Bulk Drug and Formulations
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Turk J Pharm Sci. 2019 Dec; 16(4): 457–465.