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The total ion chromatogram (TIC) of methanol (A) and 150 °C–270 °C extract samples dissolved with methanol (B), peak a to f represented for furfural (a), 2-methoxyphenol (b), 2-methoxy-4-methylphenol (c), 4-ethyl-2-methoxyphenol (d), 2,6-dimethoxyphenol (e), and 5-tertbutylpyrogallol (f).
