Pyripyropenes, Novel ACAT Inhibitors Produced by Aspergillus fumigatus. III. Structure Elucidation of Pyripyropenes E to L.

The Journal of Antibiotics
1995.0

Abstract

Eight new pyripyropenes, E to L, were isolated from the culture broth of Aspergillus fumigatus FO-1289-2501 selected as a higher producer by NTG mutation. Structural elucidation indicated that all the pyripyropenes have the same pyridino-alpha-pyrone sesquiterpene core as pyripyropenes A to D. Among them, pyripyropene L showed the most potent inhibition against acyl-CoA: cholesterol acyltransferase (ACAT) activity with an IC50 value of 0.27 microM in rat liver microsomes.

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