title: Mass spectrometric evidence for demethylated homologs occurring at trace levels in trichothecene standards.
abstract: Compounds with molecular weights 14 a.m.u. lower than their corresponding parent compounds have been detected in trichothecene standards during gas chromatography-mass spectrometry analysis. The positive ion chemical ionization mass spectra indicated that these compounds were trichothecene homologs lacking a methyl group on the isovaleroxy substituent at the C-8 position. Demethylated derivatives have been found in the standards of T-2, HT-2, and T-2 triol prepared in our laboratory and those obtained from a commercial source.
mesh_terms: D003640:Dealkylation; D005670:Fusarium / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D012717:Sesquiterpenes / Q000032:analysis*; D014255:Trichothecenes / Q000032:analysis* / Q000592:standards
chemical_list: D012717:Sesquiterpenes; D014255:Trichothecenes