Pannarin is a secondary metabolite produced by lichens belonging to the chemical class of depsidones (Jackman et al. 1975). This molecule is usually found in Psoroma species (Piovano et al. 1985), whose use in traditional medicine is unknown. This substance was demonstrated to be active against prostate carcinoma (Russo et al. 2006), to induce apoptosis in human melanoma cells (Russo et al. 2008, p. 468) and to be active against cutaneous leishmaniasis (Fournet et al. 1997).