Hyrtiazepine, an azepino-indole-type alkaloid from the Red Sea marine sponge Hyrtios erectus.

@article{Sauleau2006HyrtiazepineAA,
  title={Hyrtiazepine, an azepino-indole-type alkaloid from the Red Sea marine sponge Hyrtios erectus.},
  author={Pierre Sauleau and Marie-Thérèse Martin and Marie-Elise Tran Huu Dau and Diaa T. A. Youssef and Marie‐Lise Bourguet‐Kondracki},
  journal={Journal of natural products},
  year={2006},
  volume={69 12},
  pages={
          1676-9
        }
}
Biological and chemical investigations of the methanolic crude extract of the Red Sea marine sponge Hyrtios erectus led to the isolation of a novel azepino-indole-type alkaloid named hyrtiazepine (2) and 5-hydroxy-1H-indole-3-carboxylic acid methyl ester (3), together with the known metabolites hyrtiosulawesine (1), 5-hydroxyindole-3-carbaldehyde (4), hyrtiosin A (5), and hyrtiosin B (6). Their structures were elucidated on the basis of mass spectrometry and detailed 2D NMR spectroscopic data… 
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References

Systema Porifera. A Guide to the Classification of Sponges
Volume 1: Introductions and Demospongiae. Abbreviations. Acknowledgements. Copyright Credits. Preface. Introduction J.N.A. Hooper, R.W.M. Van Soest. Phylum Porifera Grant, 1836 J.N.A. Hooper, R.W.M.