Araguspongin B

ARAGUSPONGINE B

(+)-XESTOSPONGIN B

[1R-(1R*,4AR*,11S*,12AR*,13R*,16AR*,23S*,24AR*)]-EICOSAHYDRO-5H,17H-1,23:11,13-DIETHANO-2H,14H-[1,11]DIOXACYCLOEICOSINO[2,3-B:12,13-B'] DIPYRIDINE