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    4-Butyryoxy-2.5-Dimethyl-3(2H)-Furanone, Natural

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    4-Ethoxy-2.5-Dimethyl-3(2H)-Furanone, Natural

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    4-Ethylguaiacol, Natural

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    4-Hydroxy-5-Ethyl-2-Methyl-3(2H)-Furanone, Natural

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    4-Hydroxy-5-Methyl-3(2H)-Furanone

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    4-Methoxy-2.5-Dimethyl-3(2H)-Furanone, Natural

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    4-Methyl-4-Furfurylthio-2-Pentanone, Natural

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    4-Methyl-4-Mercapto-2-Pentanone, Natural

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    4-Methyl-4-Methylthio-2-Pentanone, Natural

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    4-Methyl-5-Thiozoleethanol Acetate, Natural

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    4-Methyl-5-Vinyl Thiazole, Natural

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    4-Methyl-5(?-thydroxyethyl) Thiazole, Natural

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