Formation of Diketopiperazines by Penicillium italicum Isolated from Oranges

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RESUMO

Prolyl-2-(1′,1′-dimethylallyl)tryptophyldiketopiperazine and 12,13-dehydroprolyl-2-(1′,1′-dimethylallyl)tryptophyldiketopiperazine, known metabolites of Aspergillus ustus, were produced in low yield by Penicillium italicum in liquid culture and on unsterilized orange peel.

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