When an Optically Active D-Aldopentose Was Subjected to Kiliani-Fischer Synthesis

question 118

Essay

When an optically active D-aldopentose was subjected to Kiliani-Fischer synthesis, followed by NaBH₄/H₂O, it produced a mixture of an optically active and an optically inactive alditol. When the same D-aldopentose was subjected to Wohl degradation followed by HNO₃ it produced an optically inactive aldaric acid. Provide the structure of this D-aldopentose.

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