
%0 Journal Article
%A Elix, JA 
%A Engkaninan, U 
%T The structure of lividic acid. A depsidone from the lichen <I>Parmelia formosana</I>
%J Australian Journal of Chemistry
%D 1976/01/01
%V 29
%N 1
%P 203-207
%K 
%R https://doi.org/10.1071/CH9760203
%U https://www.publish.csiro.au/paper/CH9760203 
%X The depsidone, lividic acid [1'-carboxy-2',3-dihydroxy-4.methoxy-6-(2&quot;-oxoheptyl)-6-pentyldepsidone](1) has been isolated from the lichen Parmelia formosana Zahlbr. The structure of this compound followed from a combination of spectroscopic properties and chemical interconversions. The overall substitution pattern of this depsidone was confirmed by methylation with excess diazomethane, whereupon methyl 3-methoxy-2',4,4'-tri-O-methylisophysodate was obtained. Further, lividic acid was synthesized from 3-hydroxyphysodic acid by methylation of the corresponding benzyl ester and subsequent hydrogenolysis. 
