Health & Environmental Research Online (HERO)


Print Feedback Export to File
8093912 
Journal Article 
A New Dibenzofuran, Isostrepsilic Acid, Produced by Cultured Mycobiont of the Lichenized Ascomycete Usnea orientalis 
Kon, Y; Iwashina, T; Kashiwadani, H; Wardlaw, JH; Elix, JA 
1997 
72 
2 
67-71 
English 
Two dibenzofurans, isostrepsilic acid and hypostrepsilic acid, were produced in large amounts by the mycobiont of Usnea orientalis cultured on malt-yeast extract medium containing sugar alcohols. These substances were not detected in the natural lichen thalli growing in the field which normally produces usnic acid and salazinic acid. Isostrepsilic acid is a new lichen substance which has been determined to be 3,7-dihydroxy-9- hydroxymethyl-1-methyldibenzofuran-2-carboxylic acid.