Research on the chemical composition of gorgonian Pseudoterogorgia americana, which grows in the coasts of Havana, has led to the isolation of a new sesquiterpene hydrocarbon, 1,1-dimethyl-7-isopropylidene-1,2,3,4,5,6,7,8-octahydronaphthalene, named caridiene. This compound not previously reported, was found to be a major constituent of the volatile fraction. The proposed structure was confirmed by spectroscopical data (UV, IR, Raman, MS, 1H and 13C NMR techniques).
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