820 Wisconsin Academy of Sciences, Arts, and Letters. 
unsubstituted hydrogen instead of the chroman group implied 
by Perkin’s idea. This, they state would make catechin the 
cumaran derivative of leuco maelurin. 
Perkin’s suggestion. 
CH CH CH 
Catechin 
Kostanecki’s formula. 
COH CH COH CH 
COH CH COH CH 
Leuco maelurin 
CH CH 
COH 
HOC 
; C CH 2 
I 
C CH2 
^ o^ 
The more important contributions to the chemistry of catechin 
are included in the following list: 
Catechin occurs in the heart wood of Acacia catechu, in the 
“Gambir” from Ouruparia gambir, 7 and in TJncaria gambir, 8 
7 Czapek, II. p. 573. 
8 Jr. Chem. Soc., 81, p. 1160. 
