Studies of Australian Soft Corals. XXXVI The Isolation and Structure Determination of 11 Calamenene-Based Sesquiterpenes from Lemnalia cervicornis (Coelenterata, Octocrrallia, Alcyonacea)

Article abstract of DOI:10.1071/CH9860103

The soft coral Lemnalia cervicornis May 1898 has afforded 13 novel sesquiterpenoid metabolites.The majority were derivatives of calamenen-7-ol and the structures were deduced by 1H and 13C n.m.r. spectroscopy.Absolute stereochemistry of compounds (3)-(13) was determined by chemical correlation with 7-hydroxycalamenen-3-one (3) for which an X-ray structure determination of its 7-p-bromobenzoyl derivative is reported.Two minor metabolites (15) and (16) were not aromatic, but were structurally related to the algal metabolite zonarene (21) for which absolute stereochemistry was available.