The given structure is the enol form of:

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(D) The given structure is an enediol intermediate formed during the Lobry de Bruyn-van Ekenstein transformation. In an alkaline medium,$D$-glucose,$D

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All of these

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(D) The given structure is an enediol intermediate formed during the Lobry de Bruyn-van Ekenstein transformation. In an alkaline medium,$D$-glucose,$D$-mannose,and $D$-fructose all undergo tautomerization to form a common enediol intermediate. Therefore,the given enol form is common to all three sugars.

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