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Four dimeric prenylindoles occurring in diastereomeric pairs, the caulindole A-D, 5-(3-methyl-2-butenyl)-1H-indole, and (E)-5-(3-methylbuta-1,3-dienyl)-1H-indole were isolated from the stem and root barks of Isolona cauliflora, an ecologically endangered Annonaceae species. Structural determination was achieved based on interpretation of spectroscopic data. Biogenetically, the caulindoles are considered...
Two new aporphinoid alkaloids, lettowianthine and 11-methoxylettowianthine were isolated from the root bark of Lettowianthus stellatus, together with the new sesquiterpene 11-hydroxyguaia-4,6-diene and the known compounds liriodenine, (Z)-7-octadecen-9-ynoic acid, methyl (2E,6E,10R)-10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate, methyl (2E,6E,10R)-10,11-dihydroxy-3,7,11-trimethyl-2,6-dodecadienoate,...
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