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  • "N-(Protocatechuyl)phenylalaninols" x
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. Their configuration was established by the synthesis of nigerrimin B. Key words: Pulvinic Acids, N-(Protocatechuyl)phenylalaninols, Fungi, Taxonomy, Synthesis Introduction Based on DNA sequence data and morphological criteria, Binder and Bresinsky [1] proposed the new bolete genus Retiboletus, which includes R. retipes, R. ornatipes, R. flavoniger, R. griseus, and R. niger- rimus. Whereas the first three species are characterized by the occurrence of retipolides [2], the metabolites of R. griseus and R. nigerrimus remained unknown. We have now carried out a