Journal
MARINE DRUGS
Volume 3, Issue 3, Pages 78-83Publisher
MOLECULAR DIVERSITY PRESERVATION INTERNATIONAL
DOI: 10.3390/md303078
Keywords
polycitorols; polycitoridae; tricyclic alkaloids; ascidian; polycyclic alkaloids
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Two new tricyclic alkaloids, polycitorols A (1) and B (2) have been isolated along with the known lepadiformine (3) from a marine ascidian of the family Polycitoridae. The structures of the new compounds were elucidated by analysis of NMR data and comparison with those of 3 and other related compounds [1-5]. Compounds 1 and 2 are closely related to cylindricines A and B, lacking C-4 oxygenation found in cylindricines and having a butyl instead of a hexyl appendage. NOE experiments on compounds 1 and 2 suggested the A/B ring fusion to be cis.
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