Therefore, its contribution to the wine flavor was negligible.
Since an odor threshold was not available for c-lactone, its contribution
cannot be determined.
Two volatile phenolic compounds were detected in the gingko
wine: thymol and carvacrol. The total content of volatile phenolic
compounds was 0.4 mg/L, accounting for 1.0% of the total volatile
compounds. Phenols in wines can be generated from p-coumaric
acid and ferulic acid (Rapp & Mandery, 1986). The concentration
of thymol was higher than its detection threshold (OAV = 1.6),
while carvacrol displayed a reversed trend. It has been indicated
that phenols often have spicy and smoky aroma.