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The novel liehen substance porphyrilic acid methyl ester and pannaric acid are reported the first time in the lichen genus Psoroma. They are constituents in the two varieties of the new species Psoroma tenue as well as in members of the Psoroma hypnorum/paleaceum aggr. and in a hitherto underscribed species from the southern hemisphere. Both dibenzofuranes are characterized by mass spectrometry and UV/VIS spectroscopy. A third compound of unknown structure (Ut) has been found additionally in the two varieties of P. tenue and in some specimens of the P. hypnorum/paleaceum group.

zeitschrift für naturforschung c

Pannarsäure und Porphyrilsäuremethylester — Sekundärstoffe der Flechtengattung Psoroma / Pannaric Acid and Prophyrilic Acid Methyl Ester Lichen Substances in the Genus Psorma