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Z. Naturforsch. 2014, 69b, 432 – 438
doi:10.5560/ZNB.2014-3307
Chromapedic Acid, Pulvinic Acids and Acetophenone Derivatives from the Mushroom Leccinum chromapes (Boletales)
Gertraud Gruber, Lydia Kerschensteiner and Wolfgang Steglich
Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5–13 (Haus F), 81377 München, Germany
Reprint requests to Prof. Dr. Wolfgang Steglich. Fax: +49-89-2180-77756. E-mail: wos@cup.uni-muenchen.de
Received December 2, 2013 / published online April 7, 2014
Dedicated to the memory of the late Dr. Ryuji Marumoto
The pigment responsible for the bright-yellow color of the stalk bases of Leccinum chromapes is methyl isoxerocomate, which is accompanied by lesser amounts of isoxerocomic acid and atromentic acid. In addition, 4′-hydroxy- and 3′,4′-dihydroxyacetophenone, previously unreported as metabolites of Basidiomycetes, were isolated. The pink color of the cap skin is due to variegatorubin. This pigment is accompanied by chromapedic acid, a γ-butenolide of biosynthetic interest representing a new dimerization mode of 4-hydroxyphenylpyruvic acid in Boletales.
Key words: Boletales, Pulvinic Acids, Mushroom Pigments, Arylpyruvic Acid Dimers
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