NEW LICHEN β-ORCINOL DEPSIDONES AND THEIR CONGENORS

Abstract

  The β-orcinol depsidones, convirensic acid (2), conprotocetraric acid (4), confumarprotocetraric acid [Cph-2] (6) and consuccinprotocetraric acid (8) have been identified in the lichens, Sulcaria virens, Usnea trichodeoides, Cladonia phyllophora and Flavoparmelia succinprotocetrarica respectively. These new depsidones have been synthesized and characterized, and their likely modes of biosynthesis discussed.