title: Identification of a propantheline analog in propantheline bromide tablets.
abstract: A major impurity in a sample of propantheline bromide tablets has been identified as 9-hydroxypropantheline on the basis of the proton magnetic resonance (PMR) and mass spectra (MS). This identification was confirmed by methanolysis of the tablet extract, which yielded a mixture of methyl xanthanoate and methyl 9-hydroxyxanthanoate. A liquid chromatographic (LC) procedure is described which will permit quantitation of 9-hydroxypropantheline bromide in the presence of propantheline bromide, xanthone, and xanthanoic acid.
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods; D002855:Chromatography, Thin Layer / Q000379:methods; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry / Q000379:methods; D011413:Propantheline / Q000032:analysis*; D013055:Spectrophotometry, Infrared / Q000379:methods; D013607:Tablets
chemical_list: D013607:Tablets; D011413:Propantheline