Madangamines B-E, Pentacyclic Alkaloids from the Marine Sponge Xestospongia ingens
Four new pentacyclic alkaloids, madangamines B-E (3-6), have been isolated from the marine sponge Xestospongia ingens collected in Papua New Guinea.
Kong
F
Departments of Chemistry and Oceanography-Earth and Ocean Sciences, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1.
Graziani
EI
Andersen
RJ