
%0 Journal Article
%A Elix, John A. 
%A Wardlaw, Judith H. 
%T The Structure of Chalybaeizanic Acid and Quaesitic Acid, Two New Lichen Depsidones Related to Salazinic Acid
%J Australian Journal of Chemistry
%D 1999/08/19
%V 52
%N 7
%P 713-716
%K 
%R https://doi.org/10.1071/CH99056
%U https://www.publish.csiro.au/paper/CH99056 
%X The depsidones chalybaeizanic acid (1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7 H-isobenzofuro- &#91;4,5-b&#93;&#91;1,4&#93;benzodioxepin-5,11-dicarbaldehyde) (4) and quaesitic acid (11-formyl-1,4,10-trihydroxy-8- methyl-3,7-dioxo-1,3-dihydro-7 H-isobenzofuro&#91;4,5-b&#93;&#91;1,4&#93;benzodioxepin-5-methyl hydrogen fumarate) (5) have been isolated from the lichens Xanthoparmelia amphixanthoides and Hypotrachyna quaesita respectively, and their structures determined by a combination of spectroscopic evidence, partial synthesis, derivatization or degradation reactions. 
