Investigations on nonsulfonamide Bratton-Marshall-positive compounds in porcine liver.
An unknown Bratton-Marshall-positive compound was observed when liver extracts were screened by a procedure for the simultaneous determination of sulfamethazine and sulfathiazole in swine livers. The unknown has been conclusively identified as o-aminobenzoic acid (anthranilic acid), a tryptophan metabolite, by gas-liquid chromatography-mass spectrometry of swine liver extracts obtained by a modified Tishler procedure for sulfonamide residues in animal tissues.
D000818:Animals; D008401:Gas Chromatography-Mass Spectrometry; D008099:Liver / Q000032:analysis*; D013552:Swine; D062367:ortho-Aminobenzoates / Q000302:isolation & purification*
D062367:ortho-Aminobenzoates