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Appl Environ Microbiol. 1974 November; 28(5): 892-894
Copyright © 1974 American Society for Microbiology. All Rights Reserved.
Health Protection Branch, Health and Welfare Canada, Ottawa, Ontario, Canada K1A OL2
ABSTRACT
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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