Fungal metabolites. II. Structural elucidation of minor metabolites, valinotricin, cyclonerodiol oxide, and epicyclonerodiol oxide, from Trichoderma polysporum.

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A new minor metabolite, valinotricin (1), along with cyclonerodiol oxide (9) and epicyclonerodiol oxide (10) was isolated from Trichoderma polysporum. The structure of valinotricin was elucidated as 1 by chemical and spectral studies, and then confirmed by synthesis. Chemical and spectroscopic studies of cyclonerodiol oxide and epicyclonerodiol oxide led to the structures 9 and 10, respectively.

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