

FOLLOWUS
1. Key Laboratory of Experimental Marine Biology Institute of Oceanology Chinese Academy of Sciences
2. Graduate University of Chinese Academy of Sciences
Online First:07 March 2013,
Published:2013
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Sun, H., Gao, S., Li, X. et al. Chemical constituents of marine mangrove-derived endophytic fungus Alternaria tenuissima EN-192., Chin. J. Ocean. Limnol. 31, 464–470 (2013). https://doi.org/10.1007/s00343-013-2106-2
A chemical investigation of the ethyl acetate extract of the fermentation broth of Alternaria tenuissima EN-192
an endophytic fungus obtained from the stems of the marine mangrove plant Rhizophora stylosa
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 Vibrio anguillarum
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.
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