14 



CARBOHYDRATES 



►^0 



OH 

 OH 



(3 - L -ar abinopyranose 



Q-D-arabinopyranose 



CH2OH 



.OH 

 H0\— KOH 



a-D-glucopyranose 



CHoOH 

 I ^ 



HOCH 



VOH /I 

 OH 



a-D-glucofuranose 



Ov OH 

 HO, 



VT 



OH 



HOCH 



I 

 CHjOH 



a-L-glucofuranose /3-L-glucopyranose 



(to illustrate the conventions) 

 FIGURE 2-3: CYCLIC FORMS OF SOME SUGARS 



