
%0 Journal Article
%A Berry, RC 
%A Eade, RA 
%A Simes, JJH 
%T Extractives of Australian timbers. XVII. The isolation, structure and synthesis of koparin (7,2',3'-Trihydroxy-4'-methoxyisoflavone)
%J Australian Journal of Chemistry
%D 1977/08/01
%V 30
%N 8
%P 1827-1835
%K 
%R https://doi.org/10.1071/CH9771827
%U https://www.publish.csiro.au/paper/CH9771827 
%X The isolation of koparin, a minor constituent of the wood of Castanospermum australe, is described. By a combination of chemical and spectroscopic methods koparin was shown to be either 7,3?,4?-tri- hydroxy-2?-methoxyisoflavone (5) or 7,2?,3?-trihydroxy-4?- methoxyisoflavone (6). The latter compound has been synthesized by demethylenation of 7-hydroxy-4?-methoxy-2?,3?-methylenedioxyiso- flavone (9) and is identical with koparin. 
