a gas chromatographic-mass spectrometric screening procedure is described for the identification and differentiation of the following alkylamine antihistamines and their metabolites in urine : azatadine , benzquinamide , brompheniramine , chlorphenamine , ( clofedanol ) , cyproheptadine , dimetindene , ketotifen , mebhydroline , phenindamine , pheniramine , pyrrobutamine , terfenadine and tolpropamine .
C0008281
chlorphenamine
C0031408
pheniramine