Dictazolines A and B, bisspiroimidazolidinones from the marine sponge Smenospongia cerebriformis.

@article{Dai2008DictazolinesAA,
  title={Dictazolines A and B, bisspiroimidazolidinones from the marine sponge Smenospongia cerebriformis.},
  author={Jingqiu Dai and Jorge I. Jim{\'e}nez and Michelle Kelly and Shawn S. Barnes and Patricia Lorenzo and Philip G Williams},
  journal={Journal of natural products},
  year={2008},
  volume={71 7},
  pages={1287-90}
}
An extensive study of the secondary metabolites produced by the marine sponge Smenospongia cerebriformis has led to the isolation of two new bisspiroimidazolidinone derivatives, dictazolines A (1) and B (2), along with the known soft coral metabolites tubastrindoles A (3) and B (4). The structures were assigned by 2D NMR spectroscopic methods. 

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