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Chemical constituents of marine mangrove-derived endophytic fungus Alternaria tenuissima EN-192
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Chemical constituents of marine mangrove-derived endophytic fungus Alternaria tenuissima EN-192
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Chemical constituents of marine mangrove-derived endophytic fungus Alternaria tenuissima EN-192
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Journal Article
Chemical constituents of marine mangrove-derived endophytic fungus Alternaria tenuissima EN-192
2013
Overview
A chemical investigation of the ethyl acetate extract of the fermentation broth of Alternariatenuissima EN-192, an endophytic fungus obtained from the stems of the marine mangrove plant Rhizophorastylosa, resulted in the isolation of nine known secondary metabolites, including four indole-diterpenoids: penijanthine A (1), paspaline (2), paspalinine (3), and penitrem A (4); three tricycloalternarene derivatives: tricycloalternarene 3a (5), tricycloalternarene 1b (6), and tricycloalternarene 2b (7); and two alternariol congeners: djalonensone (8) and alternariol (9). The chemical structures of these metabolites were characterized through a combination of detailed spectroscopic analyses and their comparison with reports from the literature. The inhibitory activities of each isolated compound against four bacteria were evaluated and compounds 5 and 8 displayed moderate activity against the aquaculture pathogenic bacterium Vibrioanguillarum, with inhibition zone diameters of 8 and 9 mm, respectively, at 100 μg/disk. To the best of our knowledge, this is the first report on the secondary metabolites of mangrove-derived A lternaria tenuissima and also the first report of the isolation of indole-diterpenoids from fungal genus A lternaria.
Publisher
Springer Nature B.V
Subject
