Chapter 21.4, Problem 7P

Interpretation Introduction

Interpretation:

A sugar that is the $\text{C}-3$ epimer of $\text{D-fructose}$ is to be stated.

Concept Introduction:

Epimers are the monosaccharide which differs in the structure at only one of the asymmetric center and they are particular kind of stereoisomers that are not enantiomers. For example, $\text{D-xylose}$ and $\text{D-ribose}$ are the $\text{C}-3$ epimers because they differ in the configuration only at carbon number 3 starting from the above rest whole structure is same.