CHEMISTRY 225 



CHO 

 I 

 HCOH 

 I 

 HOCH 



I 

 HCOH 



I 

 HCOH 



I 



CH 2 OH 



1 



CHoOH CHOH CHO 



I II I 



CO C-OH HO-C-H 



I I I 



HO-C-H =^ HO-C-H *=*= HO-C-H 



I I I 



H-C-OH H-C-OH H-C-OH 



I I I 



H-C-OH H-C-OH H-C-OH 



I I I 



CH 2 OH CH 2 OH CH 2 OH 



Levulose Mannose 



are known sometimes to lead to the formation 

 of lactic acid, CH 3 CHOHCOOH, methyl- 

 glyoxal, CH 3 COCHO, and formaldehyde, 

 HCHO. Further, as Neff has shown, 1 many 

 other substances may also be formed. Such 

 bodies chiefly belong to the class of oxyacids. 

 It is also certain that a great variety of other 

 simple sugars resembling glucose, levulose, 



1 Neff, "Liebig's Annallen," 376, p. 1, 1910, and 357, 

 p. 294, 1907. 

 Q 



