Defensive 2-alkylpyrrole sulfamates from the marine annelid Cirriformia tentaculata

Three novel 2-alkylpyrrole sulfamates (1-3) were isolated from the marine worm Cirriformia tentaculata. The structures were elucidated by the interpretation of spectral data obtained on inseparable mixtures of the unstable compounds. This suite of metabolites deterred feeding by the generalist predatory fish Thalassoma bifasciatum.