Cycloechinulin is an unusual diketopiperazine isolated from Aspergillus ochraceus. Cycloechinulin has not been extensively studied but exhibits insecticidal activity against the lepidopteran crop pest, Helicoverpa zea. Recently, cycloechinulin has found use as a secondary metabolite standard for polyphasic taxonomy in Aspergillus.
- New diketopiperazine metabolites from the sclerotia of Aspergillus Ochraceus. De Guzman F.G.S. et al., J. Nat. Prod. 1992, 55, 931.
- Cycloechinulin antiinsectan metabolite. De Guzman F.S. et al., US Patent 5196420.
- Polyphasic taxonomy of Aspergillus fumigatus and related species. Hong S-B. et al., Mycologia 2005, 97, 1316.