Three New Lichen Depsidones

Abstract

The depsidones α- acetylconstictic acid (5-acetoxymethyl-1,4-dihydroxy-10-methoxy-8-methyl-3,7-dioxo-1,3-dihydro-7 H- isobenzofuro [4,5- b][l,4] benzodioxepin-ll-carbaldehyde ) (6), substictic acid (1,4-dihydroxy-10-methoxy-8-methy1-3,7-dioxo- 1,3-dihydro-7 H- isobenzofuro [4,5-b][1,4]benzodioxepin-11-carbaldehyde) (7) and conphysodalic acid (9-acetoxymethyl-3,8-dihydroxy-4-hydroxymethyl-1,6-dimethyl-11-oxo-11 H- dibenzo [ b,e ][l,4]dioxepin-7-carboxylic acid) (12) have been identified in lichens and characterized.