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Impact of barrel toasting (LT: Light Toasting; MT: Medium Toasting; MT+: Medium Toasting Plus; HT: High Toasting; N: Normal; S: Slow) on concentrations of the ellagitannin-derived spirit compounds (9–16) in eau-de-vie at 18 months of aging. Error bar represents the confidence interval with a threshold of 0.05. Lower case letters a–e show significant differences among the different toasting modalities for each ellagitannin-derived spirit compound (p < 0.05).
