Avocado ketose

The ketose has been synthesized from D-manno-D-(/ala-heptose by the Lobry de Bruyn enolization reaction. The presence of both perseitol and the ketoheptose in the avocado fruit in the free state, and the absence of any fermentable sugar, seem to indicate that the carbohydrate metabolism of this tree is of a type not recognized previously. 

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