Plexaurella grisea

The continuing search for new marine natural products has led to the discovery of the farnesic acid glycerides (1)—(3) in the nudibranch Archidoris odhneri and the two hydrocarbons (4) and (5) from the gorgonian Plexaurella grisea Kunze. Other new farnesyl/nerolidyl sesquiterpenoids include (6)—(1and the interesting acetal eremoacetal (12) from Eremophila rotundifolia. ... 

Gopichand et al. (407) isolated two new acyclic sesquiterpene hydrocarbons (483) and (484) from the gorgonian Plexaurella grisea as well as (-h)-a-santalene (485), which is well-known from terrestrial source. Bowden et al. (408) described new sesquiterpene furans from Sinularia capillosa and S.firma, all of which were structurally related. The furanoquinol (486) was the predominant isolate and was accompanied by the related furanoquinone (487) which may be an artifact. In addition they found the methylfurans (488-492), the furan methyl esters (493-496), and the furan carboxylic acids (497-500). A related methylfuran (501) has been obtained from the Mediterranean alcyona-cean, Alcyonum palmatum (409). 

New Acyclic Sesquiterpene Hydrocarbons from the Gorgonian Plexaurella grisea. J. Org. Chem. 45, 2523 (1980). 

Rueda, A., Zubia, E., Ortega, M.J., and Salva, J. (2001a) Structure and cytotoxicity of new polyhydroxylated sterols from the Caribbean gorgonian Plexaurella grisea. Steroids, 66,897-904. 

All the linear sesquiterpenes isolated from Alcyonacea contain a furan nucleus except for that from the gorgonian Plexaurella grisea collected in the Caribbean (South Caicos) or in Puerto Rico, which contains conjugated derivatives... 

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