Which configuration (R or S) does the bottom asymmetric carbon have for the D series of sugars?
Two sugars, A and B, are known to be glucose and galactose, but it is not certain which aldaric acid, while B gives an optically active aldaric acid. Which sugar is glucose, and which is galactose.
D-Altrose is an aldohexose Ruff degradation of D-Altrose gives the same aldopentose as does degradation of D-Allose, the C3 epimer of glucose. Give the structure of D-Altrose.

Explanation

(i) `R`.
(ii) A is galactose
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