The constituents of Gymnopilus spectabilis.

Cerevisterol (1) and a new acetylenic compound, 4, 6-decadiyne-1, 3, 8-triol (2) were isolated and characterized from a hallucinogenic mushroom, Gymnopilus spectabilis (FR.) A. H. SMITH, along with ergosterol, ergosteryl peroxide and choline.Psychoactive compounds such as psilocybin and related compounds have not been detected in our collections of this mushroom, though some psilocybin has been found in several other Japanese mushrooms.