CONSTITUENTS OF THE BIOSPHERE 

 H-C=0 H— C=0 



23 



HCOH 



i 

 HCOH 



HOCH 



HOCH 



CH3 



L-rhamnose 



(6-desoxy-L-mannose) 



HOCH 

 HCOH 

 HCOH 



HOCH 



CH3 



L-fucose 

 (6-desoxy-L-galactose) 



H — C=:0 



HCH 

 HCOH 

 HCOH 

 CH2OH 



2-desoxyribose 



(/) Polyhydroxy Compounds Related to Sugars 

 The reduction of ketoses and aldoses produces the corresponding 

 alcohols. The reduction of glyceraldehyde gives glycerol, ribitol arises from 

 ribose and sorbitol is formed from glucose. 



CH.OH 



CHoOH 



H— C— OH 



CH2OH CHoOH CHoOH 



Glycerol Ribitol D-sorbitol 



The carbocylic alcohols like inositol are similar types of polyalcohol. 



OH 

 C 



H^ 



HOCH 



HCOH 



HOCH 



HCOH 



.H, 

 C 

 OH 



Inositol 



