Revised structure of xestocyclamine A and description of a new analogue

Revised structure of xestocyclamine A and description of a new analogue The structure and biogenetic origin of (-) halicyclamine B from a Xestospongia sponge Two New Alkaloids from Xestospongia sp., a New Caledonian Sponge Two New Alkaloids from Xestospongia sp., a New Caledonian Sponge Novel Marine Sponge Amino Acids, 10. Xestoaminoh from Xestaspongia sp. Novel Marine Sponge Amino Acids, 10. Xestoaminoh from Xestaspongia sp. A New Quinolizidine Alkaloid from the Papua New Guinean Sponge <i>Xestospongia exigua</i> A New Quinolizidine Alkaloid from the Papua New Guinean Sponge Xestospongia exigua Xestamines A, B, and C, Three New Long-Chain Methoxylamine Pyridines from the Sponge Xestospongia wiedenmayeri Four new β-carboline alkaloids isolated from two Okinawan marine sponges of Xestospongia sp. and Haliclona sp.)