Bassianolone: An Antimicrobial Precursor of Cephalosporolides E and F from the Entomoparasitic Fungus Beauveria bassiana.

We have established the chemical structure of (+)-bassianolone (3), the antimicrobial compound precursor of cephalosporolides E and F, and that of the furan metabolite 4 from the entomopathogenic fungus Beauveria bassiana.