R 



I 

 N NH 



\ 



II. CHEMISTRY 



R 



I 



N N 



/ 

 N CO 



CO 



I + 

 NH 



\ 



N CO 



CO 



I 

 NH 



313 



Consumption 

 of moles 



oxygen upon 

 oxidation 



0.25 



Verdoflavin (bronze-green) 



Ti 



R 



N NH 



\ 



/ 

 N CO 



CO 



I 

 NH 



0.50 



Chloroflavin (grass-green) 



Ti 



R 



N NH 



+ 



N NH 



CO X Y "^^ ^co 



I + I I I 



/H ^^^ ^ ^NH 

 XH CO NH2 CO 



Rhodoflavin (carmoisine red) 



Ti 



R 



N NH 



CO 



I 

 NH 



NH CO 



Leucoriboflavin (colorless) 



0.75 



1.0 



