Aspochracin, a New Insecticidal Metabolite of Aspergillus ochraceus Part I. Isolation, Structure and Biological Activities

Ryotaro MYOKEI; Akira SAKURAI; Ching-Fun CHANG; Yoshinori KODAIRA; Nobutaka TAKAHASHI; Saburo TAMURA

doi:10.1271/bbb1961.33.1491

Agricultural and Biological Chemistry

Online ISSN : 1881-1280
Print ISSN : 0002-1369
ISSN-L : 0002-1369

Aspochracin, a New Insecticidal Metabolite of Aspergillus ochraceus

Part I. Isolation, Structure and Biological Activities

Ryotaro MYOKEI, Akira SAKURAI, Ching-Fun CHANG, Yoshinori KODAIRA, Nobutaka TAKAHASHI, Saburo TAMURA

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1969 Volume 33 Issue 10 Pages 1491-1500

DOI https://doi.org/10.1271/bbb1961.33.1491

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Abstract

A new insecticidal substance named aspochracin was isolated from the culture filtrate of Aspergillus ochraceus, a pathogenic fungus causing muscardine on insects. The compound was found to be a novel cyclotripeptide, composed of N-methyl-L-alanine, N-methyl-L-valine and L-ornithine, containing an octatrienoic acid side chain. Isolation procedure, structural elucidation and biological activities are described in detail.

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