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The absolute stereochemistry of amphilectene metabolites from Cribochalina sp. has been revised by a detailed NMR spectroscopic study of the Mosher ester derivatives of a related alcohol. The relative stereochemistry of the previously described amphilectenes has been reinvestigated and reassigned on the basis of the X-ray structural analysis carried out on one of them. The structure of a new amphilectene...
Four novel xenicane diterpenoids, xenimanadins A–D (1–4), characterized by the unusual 2,6-dimethoxytetrahydropyran functionality, have been isolated from the Indonesian soft coral Xenia sp., together with three known xeniolides. The stereostructure of these metabolites has been established through extensive interpretation of NMR data and application of the modified Mosher method. Xenimanadins were...
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