Heliannuols are an important class of compounds isolated from Helianthus annuus, a
common sunflower, with allelopathic properties. Interestingly, two of these fourteen compounds
have been isolated from a gorgonian, Pseudopterogorgia rigida. This review compiles data on the
isolation and biological activity of heliannuols described in the literature and briefly reports the
papers describing their syntheses. This review could stimulate research into other natural species and
syntheses. Further, it describes the 1H and 13C-NMR spectral data described in the literature for the
14 heliannuols already isolated and correlates them with their respective structures. Therefore, we
believe that these searchable data enable a rapid identification in routine analysis of the crude
extracts of sunflowers or gorgonians.
Keywords: 1H and 13C-NMR spectral data, biological activities, distribution, gorgonian, heliannuols, sunflower.
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