Answers are grounded in this paper and cite their sources.
Four bis-piperidine alkaloids, madangamine F (1), haliclonacyclamine F (2). and arenosclerins D (3) and E (4), have been isolated from the marine sponge Pachychalina alcaloidifera and have been identified by analysis of spectroscopic data. The alkaloids displayed cytotoxic activity against different cancer cell lines. These results support the hypothesis of a common biogenetic origin for the Haplosclerida bis-piperidine and bis-pyridine alkaloids.
No takes yet. Share an insight, caveat, or question.
Nascimento et al. (2007) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: