New Antifeedant Bromopyrrole Alkaloid from the Caribbean SpongeStylissacaribica
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چکیده
منابع مشابه
New antifeedant bromopyrrole alkaloid from the Caribbean sponge Stylissa caribica.
In this first report on the chemistry of the sponge Stylissa caribica, two known bromopyrrole metabolites and a new compound, N-methyldibromoisophakellin (1), were isolated and identified. The structure of 1 was determined using spectroscopic methods and the computer program COCON. N-Methyldibromoisophakellin (1) was shown to be the only secondary metabolite in Stylissa caribica that, at its na...
متن کاملMonobromoisophakellin, a new bromopyrrole alkaloid from the Caribbean sponge Agelas sp.
A detailed analysis of the chemical constituents of a Caribbean specimen of Agelas sp. was carried out. Four brominated compounds (1-4) were isolated and one of them was identified as a new bromopyrrole metabolite, monobromoisophakellin (1). The structure of 1 was determined using spectroscopic methods. All compounds were tested for their antifeedant activity against the Caribbean reef fish Tha...
متن کاملSventrin, a new bromopyrrole alkaloid from the Caribbean sponge Agelas sventres.
A detailed analysis of the secondary metabolites of a specimen of Agelas sventres was carried out here for the first time. The chemistry of Agelas sponges is dominated by bromopyrrole derivatives. Besides three known bromopyrrole metabolites, a new compound, sventrin (1), was isolated and its structure identified using spectroscopic methods. Sventrin (1) was shown to be a feeding deterrent comp...
متن کاملMultiple Defensive Roles for Bromopyrrole Alkaloids from Caribbean Agelas Sponges
Previous studies have indicated that Caribbean reef sponges of the common genus Agelas are chemically defended from fish predators by brominated pyrrole alkaloids: Agelas clathrodes and A. wiedenmayeri by 4,5-dibromopyrrole-2-carboxylic acid (1) and oroidin (2), A. conifera by sceptrin (3). In this study, we expand our understanding of chemical defense in this sponge genus to include an extensi...
متن کاملNew Antifeedant Grayanane Diterpenoids from the Flowers of Pieris formosa.
Three new grayanane diterpenoids, pierisoids C‒E (1-3), as well as 10 known ones (4-13), were evaluated from the flowers of Pieris formosa, which is used as an insecticide in rural areas of China. Their structures were elucidated on the basis of extensive 1D and 2D NMR spectroscopic data analyses. Significant antifeedant activity of 1, 3 and 10 against the beet armyworm (Spodoptera exigua) was ...
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ژورنال
عنوان ژورنال: Journal of Natural Products
سال: 2001
ISSN: 0163-3864,1520-6025
DOI: 10.1021/np000482s