Wickerols A and B: novel anti-influenza virus diterpenes produced by Trichoderma atroviride FKI-3849

Abstract: Wickerols A and B were produced by a fungus, Trichoderma atroviride FKI-3849. Wickerol A showed potent anti-influenza virus activity against strain A/PR/8/34 (H1N1), whereas wickerol B exhibited weaker impact. The anti-influenza virus spectrum between wickerols A and B was different. The cyclization mechanism of the wickerol carbon-skeleton was investigated by incorporation of 13C-labeled acetate. A pathway through the verticillyl cation was predicted. [Copyright &y& Elsevier]