Bifurcaria bifurcata

Scheme 8. Structures of eleganolone and elegandiol from the cystoseiracean alga Bifurcaria bifurcata.

Bifurcaria bifurcata, Fucus vesiculosus and Himanthalia elongata. Isol. as nona-Ac. 

The extracts of the brown alga Bifurcaria bifurcata that had shown seasonal variation were examined as settlement inhibitors of two marine bacteria and the barnacle Balanus amphitrite [131]. The increased activity during April-June corresponded to the seasonal maximum concentration of the major diterpene ele-ganediol 43 found in the crude extracts [132], but isolated compounds were not individually tested for their antifouling activity [131]. 

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