Didemnimides A−D: Novel, Predator-Deterrent Alkaloids from the Caribbean Mangrove Ascidian Didemnum conchyliatum
The Journal of Organic Chemistry1997Vol. 62(5), pp. 1486–1490
Citations Over TimeTop 10% of 1997 papers
Abstract
Four new alkaloids, didemnimides A−D (1−4), possessing a novel indole−maleimide−imidazole carbon skeleton, have been identified as the major predator deterrents found in the chemically-defended Caribbean mangrove ascidian Didemnum conchyliatum. The carbon skeleton of the didemnimides was identified by X-ray analysis of didemnimide A (1), while the structures of the related didemnimides B−D were subsequently assigned using combined spectral methods that emphasized one- and two-dimensional NMR methods. The didemnimides, in particular didemnimide D (4), are potent feeding deterrents against a natural assemblage of mangrove-specific carnivorous fish.
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