Estimation of impurity profiles of drugs
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Zs. Halmos; Cs. Szántay Jr.; J. Brlik; A. Csehi; K. Varga; P. Horváth; M. Kislak
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Article
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1996
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Elsevier Science
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English
⚖ 330 KB
Besides several known impurities in cimetidine, two additional compounds at levels below 0.1% were detected by ion-pair reversed-phase high-performance liquid chromatography (HPLC). The impurities were isolated from crude cimetidine using normal-phase preparative HPLC. 1H and 13C NMR and mass spectr