New Fungitoxic Sesquiterpenoids, Chokols A-G, from Stromata of Epichloe typhina and the Absolute Configuration of Chokol E

Hiroyuki KOSHINO; Satoshi TOGIYA; Shun-ichi TERADA; Teruhiko YOSHIHARA; Sadao SAKAMURA; Tadayuki SHIMANUKI; Tohru SATO; Akitoshi TAJIMI

doi:10.1271/bbb1961.53.789

Agricultural and Biological Chemistry

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

New Fungitoxic Sesquiterpenoids, Chokols A-G, from Stromata of Epichloe typhina and the Absolute Configuration of Chokol E

Hiroyuki KOSHINO, Satoshi TOGIYA, Shun-ichi TERADA, Teruhiko YOSHIHARA, Sadao SAKAMURA, Tadayuki SHIMANUKI, Tohru SATO, Akitoshi TAJIMI

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JOURNAL FREE ACCESS

1989 Volume 53 Issue 3 Pages 789-796

DOI https://doi.org/10.1271/bbb1961.53.789

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Abstract

Seven novel fungitoxic sesquiterpenoids, chokols A, B, C, D, E, F and G, were isolated from stromata of Epichloe typhina on Phleum pratense. Their structures were determined by spectroscopic methods. The absolute configuration of chokol E was elucidated by its CD spectrum with Eu(fod)₃ and a chemical correlation with epicyclonerodiol oxide.

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