Amathaspiramides A-F, novel brominated alkaloids from the marine bryozoan amathia wilsoni
A series of six new dibrominated alkaloids, amathaspiramides A-F (1-6), have been isolated from a New Zealand collection of the marine bryozoan Amathia wilsoni. An X-ray crystallographic structural determination of amathaspiramide F (6) revealed it to be an epimer of amathaspiramide C (3). These data, in addition to the results of NOESY NMR experiments were used to infer the absolute configuration of the amathaspiramides.
Morris
BD
Department of Chemistry, University of Waikato, Private Bag 3105, Hamilton, New Zealand.
Prinsep
MR