
%0 Journal Article
%A Lewis, KG 
%A Tucker, DJ 
%T The separation of substituted Olean-12-en-28-oic acids from the corresponding Urs-12-en-28-oic acid isomers
%J Australian Journal of Chemistry
%D 1983/11/01
%V 36
%N 11
%P 2297-2305
%K 
%R https://doi.org/10.1071/CH9832297
%U https://www.publish.csiro.au/paper/CH9832297 
%X Naturally occurring pairs of hydroxy-substituted olean-12-en-28-oic and urs-12-en-28-oic acids may be separated by treatment of the mixture with bromine in acetic acid. Members of the ursene family are inert under the conditions used. It is shown that a similar separation is possible with the 12-en-28-ol system. The leaf of Duboisia myoporoides was examined for possible variation of ursolic acid content with location. 
