Angelo Visconti, A. Bottalico, M. Solfrizzo
Sep 1, 1989
Citations
0
Influential Citations
6
Citations
Journal
Mycotoxin Research
Abstract
SummaryIsoaltenuene, a previously unknownAlternaria metabolite has been isolated from a rice culture ofAlternaria alternata and purified by semipreparative HPLC. The assigned structure, elucidated by UV, IR, MS, and NMR spectroscopy, was 2′, 3′, 4′, 5′-tetrahydro-3, 4′β, 5’α-trihydroxy-5-methoxy-2′α-methyldibenzo (α)-pyrone and corresponded to a diasteroisomer of altenuene with inverted configuration at C-2′. Isoaltenuene showed a minor phytotoxic activity on tomato leaves at level of 20 μg/spot and no antifungal activity onGeotrichum candidum (up to 20 μg/disk).