Tetrahedron Letters p. 621 - 625 (2019)
Update date:2022-08-16
Topics:
Murray, J. Sam
Selwood, Andrew I.
Harwood, D. Tim
van Ginkel, Roel
Puddick, Jonathan
Rhodes, Lesley L.
Rise, Frode
Wilkins, Alistair L.
A new analogue of gambierone, 44-methylgambierone, was isolated from the benthic dinoflagellate Gambierdiscus australes collected from Raoul Island (Rangitahua/Kermadec Islands). This molecule has been previously reported as maitotoxin-3. The structure of 44-methylgambierone was elucidated using 1D- and 2D-nuclear magnetic resonance spectroscopy and mass spectrometry techniques. The nine-ring polyether backbone (A–I) and functional groups (carbonyl, terminal diol, 1,3-diene and monosulphate) are the same for both compounds with the addition of an olefinic methyl group being the only modification in 44-methylgambierone.
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