Abstract
A new polycyclic guanidine alkaloid, ptilomycalin D, and the known crambescidic acid were isolated from the marine sponge Monanchora dianchora collected in Nosy-Be, northwest of Madagascar, in the Indian Ocean. The structures were elucidated using 1- and 2-D NMR and MS data, and their biogenetic implications are discussed.
MeSH terms
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Alkaloids / chemistry*
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Alkaloids / isolation & purification*
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Animals
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Guanidines / chemistry*
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Guanidines / isolation & purification*
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Indian Ocean
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Madagascar
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Marine Biology
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Porifera / chemistry*
Substances
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Alkaloids
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Guanidines
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ptilomycalin A
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ptilomycalin D