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The novel gymnodimine congener 12-methylgymnodimine was isolated from the dinoflagellate Alexandrium peruvianum from the New River in North Carolina. In addition, the presence of 13-desmethylspirolide C was confirmed by NMR characterization. This marks the first time these two classes of cyclic imines have been found in the same organism, providing further evidence for a direct genetic relationship...
The karlotoxins (KmTxs) are a family of compounds produced by the dinoflagellate Karlodinium veneficum which cause membrane permeabilization. The structure of KmTx 1, determined using extensive 2D NMR spectroscopy, is very similar to that of the amphidinols and related compounds, though KmTx 1 features unique structural modifications of the conserved core region. The structure of KmTx 1 differs from...
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