Essay
Compound U is an aldotetrose that can be oxidized to an optically active aldaric acid,compound V.Upon Wohl degradation,compound U is converted into D-glyceraldehyde.Upon Kiliani-Fischer chain extension,compound U is converted into compounds W and X.Compound W can be oxidized to an optically inactive aldaric acid,compound Y,but compound X is oxidized to an optically active aldaric acid Z.What are the structures of compounds U-Z?
Correct Answer:

Verified
Correct Answer:
Verified
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