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Structural formulas of compounds commonly found in alcohol extracts of agarwood from different regions. (a) isoaromadendrene epoxide, C15H24O; (b) agarospirol, C15H26O; (c) β-guaiene, C15H24; (d) benxylacatone, C10H12O; (e) 2-(2-phenylethyl)chromone, C17H14O2).
