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Novel polycyclic guanidine alkaloids from two marine sponges of the genus Monanchora
J C Braekman1, D Daloze, R Tavares
1Laboratory of Bio-organic Chemistry, Department of Organic Chemistry, Faculty of Sciences, CP160/07, University of Brussels, 50 Avenue F. Roosevelt, 1050 Brussels, Belgium. braekman@ulb.ac.be
Journal of Natural Products
|February 26, 2000
Abstract:
Two marine sponges of the genus Monanchora (Poecilosclerida, Crambeidae) have been found to contain new polycyclic guanidine alkaloids bearing the (5,6,8b)-triazaperhydroacenaphthylene skeleton. Their structures have been determined by detailed spectroscopic analysis. Dehydrobatzelladine C (1) has been isolated from M. arbuscula and crambescidins 359 (2) and 431 (3) from M. unguiculata. The chemotaxonomic implications of these findings are discussed.