Abstract
We recently identified 2,4-dihydroxy-2,5-dimethyl-3(2H)-thiophenone (DHDMT) from soy sauce as a low-molecular-weight pigment formed by the Maillard reaction. DHDMT has also been reported as an aroma compound in a model system and a biologically active compound of heated garlic. To utilize these functions efficiently, we here examined how DHDMT was formed during fermentation of soy sauce and in model systems. Although DHDMT was formed from cysteine and glucose, it was formed more from cystine and fructose in the model system. We also showed that this compound exists in various kinds of soy sauce and miso as well as in some brown foods and beverages such as roasted bread and beer.
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