Epimers CHO C2 epimers CHO CHO HO H H2OH H-OH HO斗H HO H C4 epimers HO-H CHO ）C2 epimers CHO H-OH H--OH HOH H--OH HO- H H-OH H-OH H-OH H--OH H- -OH CH,OH CH,OH CH,OH CH,OH CH,OH D-mannose D-glucose D-galactose D-erythrose D-threose Copyright 2010 Pearson Prentice Hall,Inc. Sugars that differ only in their stereochemistry at a single carbon. The carbon at which the stereochemistry differs is usually specified. Chapter 23 12Chapter 23 12 Epimers ▪ Sugars that differ only in their stereochemistry at a single carbon. ▪ The carbon at which the stereochemistry differs is usually specified