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That's a strawberry!
--- "Strawberry!
During fermentation, sake yeast produces fruit-like esters such as isoamyl acetate (banana flavor), ethyl acetate, and ethyl caproate (green apple flavor).
Among these esters, those close to the strawberry-like aroma are ethyl butyrate and ethyl 2-methyl butyrate, which are actually the same chemicals as the "strawberry flavoring" in fruits and candies.
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