Epimers Sugars that differ only in their stereochemistry at a single carbon. CHO C2 epimers CHO CHO H OH H-2 OH HO -H HO3 -H C4 epimers HO-H H -OH H--OH HO4H H-5-OH H-5 OH H -OH CH,OH CH,OH CH,OH D-mannose D-glucose D-galactose => Chapter 23 8Chapter 23 8 Epimers Sugars that differ only in their stereochemistry at a single carbon. =>