A. E. Everest 



365 



latter is in every way identical with the natural cyanidin chloride 

 obtained from the com-flower or rose. 



Thus the structure of all the pigments of this group at present 

 known in a pure condition becomes evident, and the manner in which 

 they are related to naturally occurring flavone derivatives is clearly 

 shown by the following formulae : 



HO 



Flavone derivative. 

 O 



HOy 



Kaempferol. 



Quercetin. 



OH 



Anthocyan. 

 CI 



HO 



OH 



Pelargonidin chloride. 



HO-i? 



Cyanidin chloride. 



HO 



Myricetin. 



HO- 



Delphiuidiu chloride. 



Myrtillidin chloride has one, Oenidin chloride two methoxy groups 

 in place of hydroxy groups in Delphinidin chloride, but the position 

 of these groups is, as yet, uncertain ; Willstatter tentatively gives 

 them as: 



C H,o- 



OH 



0CH3 

 OH 



Myrtillidin chloride. 



Oenidin chloride. 



