When the following aldohexose exists in D-configuration, the total number of stereoisomers in its pyranose from is :

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answer is 8.

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Detailed Solution

The D-form of the specified sugar is

The three chiral carbon configurations (starting) can be altered while retaining the D configuration. As a result, there are $= 2^{3} = 8$ different steroisomers of D-pyranose.

So, 8 is the right number.

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