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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, 4ʹ-hydroxy- and 3ʹ,4ʹ-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 g-butenolide of biosynthetic interest representing a new dimerization mode of 4-hydroxyphenylpyruvic acid in Boletales.
Graphical Abstract
Chromapedic Acid, Pulvinic Acids and Acetophenone Derivatives from the Mushroom Leccinum chromapes (Boletales)
Received: 2013-12-2
Published Online: 2014-6-2
Published in Print: 2014-4-1
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