Bitter compounds in two Tricholoma species, T. aestuans and T. virgatum

Lascivol was identified as the bitter compound in two Tricholoma species, T. aestuans and T. virgatum , and was previously isolated from the European mushroom T. lascivum . The structure of lascivol was previously solved by X-ray crystallographical analysis but its stereochemistry at C3 remained ambiguous. We thus re-examined the absolute configuration of C3 bearing a hydroxy group using the modified Mosher’s method.