Abstract
In addition to three phenolic substances (physodic acid (I), atranorin (II), and oxyphysodic acid (III)), zeorin (V), and ergosterol peroxide (VI), a new optically active depsidone named vittatolic acid (IV) has been isolated from the lichen Hypogymnia vittata (ACH.) GAS. The structure IV has been assigned to vittatolic acid on the basis of chemical and physicochemical evidence. Vittatolic acid is characteristic by the possession of a secondary alcoholic function in the aliphatic side chain.
