Aurovertins F-H from the entomopathogenic fungus Metarhizium anisopliae

Analysis of fermentation broth of the entomopathogenic fungus Metarhizium anisopliae has led to isolation of aurovertin D (1) and three new aurovertin-type metabolites, aurovertin F (2), aurovertin G (3), and aurovertin H (4). Their structures were determined on the basis of spectroscopic analyses and chemical conversions.