80 ISOLATION AND CONSTITUTION OF ANTHOCYANINS [OH. v 



A short summary of the formulae 1 given by various authors for antho- 

 cyanins may be stated as follows 2 : 



Flower-pigment of Althaea rosea 



(glucoside and oxida- 

 tion product) 



Antirrhinum (magenta 



(red) ... 

 Centaur 'ea Cyanus ... 



99 99 



Delphinium 



Malva 



Pelargonium 



(glucoside and oxida- 

 tion product) 



,, ,, Rosa gallica 



99 99 99 



Fruit- pigment of V actinium Myrlillus 



99 99 99 99 



Vitis-idaea 



,, Vitis vinifera (in wine) 



Red leaf -pigment of Coleus 



,, Vitis vinifera 



z(C 4 H 5 O 2 ) 

 C 14 H 16 6 



(Glan). 

 (Grafe). 



C 16 H 12 O 7 (Willstattcr). 

 z(C 15 H 18 O 10 ) (Wheldale). 

 z(C 8 H 9 5 ) 



o;(C 2 H 3 O 2 ) (Morot). 



C 15 H 10 O 6 (Willstatter). 

 . Ci 5 H 10 O 7 



C 17 H 14 O 7 ,, 



C 15 H 10 6 (Griffiths). 



C 18 H 26 13 (Grafe). 



C 24 H 44 O 20 



C 15 H 10 O 5 (Willstatter). 



C 7 H U O ]0 (Senier). 



C 15 H 10 O 6 (Willstatter). 



C 14 H M 7 (Heise). 



C 16 H 12 O 7 (Willstatter). 



C 20 H 10 O 10 (Glenard). 



C 20 H 20 O 10 (Gautier). 



^21^20^10 99 



C 17 H 14 O 7 (Willstatter). 



C 10 H 10 5 (Church). 



rC 19 H 1(i 10 (Gautier). 

 A C 26 H 24 O 15 ,, 



! C 17 H 18 O 10 ,, 



1 The formulae are so arranged rather as a matter of interest than for comparison, 

 since the earlier workers laboured under disadvantages which would obviously detract 

 from the value of their numbers. 



2 See also Appendix. 



