An amphoteric iminium metabolite, symbioimine (1), was isolated from a cultivated symbiotic marine dinoflagellate Symbiodinium sp. Its structure was deduced by spectroscopic analysis and X-ray crystallographic analysis. Symbioimine (1) has a characteristic 6,6,6-tricyclic iminium ring structure and an aryl sulfate moiety. The plausible biogenetic pathway of… (More)
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