Birnbaumin A and B: Two Unusual 1-Hydroxyindole Pigments from the Flower Pot Parasol Leucocoprinus birnbaumii

摘要

Occasionally the Yellow Parasol or Flower Pot Parasol (Leucocoprinus birnbaumii (Corda) Singer) appears in flowerpots and greenhouses, where it attracts attention because of its intense yellow color and delicate shape. It originated in the tropics and was distributed worldwide with plants and potting soil.[1] Until now, the chemical constituents of the fungus have remained unknown. Herein, we report the unusual structures of its yellow pigments, which we have named birnbaumin A and B.