THE CHEMISTRY OE PHOTOSYNTHESIS 275 



From 1 there are formed by rearrangement of the endiol : 



H H OH H 



I I I I 

 CHoOH — C — C — C — C — CH : O, 



I I I I 

 OH OH H OH 



d-ghicose 



H H OH OH 



I I I I 



CHoOH — C — C — C— C — CH:0 



I I I I 

 OH OH H H 



d-mannose 



H H OH O 



I I I II 

 CHoOH — C — C — C — C — CH.OH, 



III 



OH OH H 



d-fructose 



H H H O 



I I I II 

 CH2OH — C — C — C — C — CHoOH 



III 

 OH OH OH 



d-pseudo fructose 



From 2 by rearrangement, 



H H O H 



I I II I 



CH..OH — C — C — C — C — CHoOH, 



II I " 

 OH OH OH 



H H O OH 



I I II I 



CHoOH — C — C— C — C— CHoOH 



II I ■ 

 OH OH H 



a and P-d-gkitose 



