| Abstract
| - (E)-1-(2,3,6-Trimethylphenyl)buta-1,3-diene (TPB) was identified as a potent odorant in acidhydrolysates of crude glycoconjugate fractions isolated from grapes and grape vine leaves. TPBwas also identified in a Semillon wine, using gas chromatography/mass spectrometry, by co-injectionwith an authentic sample. TPB had an aroma detection threshold of 40 ng/L in a neutral white wineand the concentration of TPB in four out of five white wines analyzed ranged from 50 to 210 ng/L. Keywords: Wine; grape; odorant; glycoside; 2,3,6-trimethylphenylbutadiene
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