Xestospongia ingens

A number of additional ingenamine-type alkaloids have been reported. Xestocyclamine B (80) was isolated from the same Xestospongia sp. that was the source of xestocyclamine A (74) [54], Xestospongia ingens yielded ingamines A (81) and B (82), ingenamines B (83), C... 

Ingenamine, A Novel Pentacyclic Alkaloid from the Marine Sponge Xestospongia ingens. Kong, F. Andersen, R. J. and Allen, T. M. Tetrahedron Lett. 1994, 35, 1643. 

Ingenamine Alkaloids isolated from the sponge Xestospongia ingens Structures and Absolute Configurations. Kong, F. and Andersen, R. J. Tetrahedron 1995, 51, 2895. 

Minor alkaloid from the Papua New Guinea sponge Xestospongia ingens. Powder, [ix] +22.4 (c, 0.25 in MeOH). 

Minor alkaloid from the Papua New Guinea sponge Xestospongia ingens. Glass. 

Madangamine A (13) (Fig. 3), which was isolated from Xestospongia ingens by Andersen et al. in 1994, has a 2,6-diazatricyclo[6.2.2.0 ]dodecane skeleton [41,42]. Weinreb prepared this skeleton from a cis-fused hydroisoquinoline derivative (33) by amino-merculation [43]. Diels-Alder reaction [43],... 

Figure 3 Other alkaloids isolated from Xestospongia ingens.

Cyclostellettamines were found in the astrophoiid sponge Stelletta maxima (see above) and ingenamines in Xestospongia ingens (see above). 

Kong, F Andersen, R,J and Allen, T.M. (1994a) Ingamines A and B, new cytotoxic alkaloids from the marine sponge Xestospongia ingens. Tetrahedron. 50, 6137-6144. 

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