Structure elucidation and in vitro toxicity of new azaspiracids isolated from the marine dinoflagellate Azadinium poporum

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Abstract

Two strains of Azadinium poporum, one from the Korean West coast and the other from the North Sea, were mass cultured for isolation of new azaspiracids. Approximately 0.9 mg of pure AZA-36 (1) and 1.3 mg of pure AZA-37 (2) were isolated from the Korean (870 L) and North Sea (120 L) strains, respectively. The structures were determined to be 3-hydroxy-8-methyl-39-demethyl-azaspiracid-1 (1) and 3-hydroxy-7,8-dihydro-39-demethyl-azaspiracid-1 (2) by 1H- and 13C-NMR. Using the Jurkat T lymphocyte cell toxicity assay, (1) and (2) were found to be 6- and 3-fold less toxic than AZA-1, respectively.

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Krock, B., Tillmann, U., Potvin, É., Jeong, H. J., Drebing, W., Kilcoyne, J., … Köck, M. (2015). Structure elucidation and in vitro toxicity of new azaspiracids isolated from the marine dinoflagellate Azadinium poporum. Marine Drugs, 13(11), 6687–6702. https://doi.org/10.3390/md13116687

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