Suillusin, a unique benzofuran from the mushroom Suillus granulatus

A unique benzofuran named suillusin was isolated from the methanolic extract of the fruiting body of the mushroom Suillus granulatus. Its structure was assigned on the basis of various spectroscopic analyses as a highly substituted novel 1H-cyclopenta[b]benzofuran (1). Suillusin is suggested to be biogenerated from polyporic acid.