
%0 Journal Article
%A Neve, Juliette E. 
%A McCool, Brian J. 
%A Bowden, Bruce F. 
%T Excavatolides N&#8211;T, New Briaran Diterpenes from the Western Australian Gorgonian <emph type="2">Briareum excavatum</emph>
%J Australian Journal of Chemistry
%D 1999/07/23
%V 52
%N 5
%P 359-366
%K 
%R https://doi.org/10.1071/CH98180
%U https://www.publish.csiro.au/paper/CH98180 
%X A Western Australian sample of the gorgonian Briareum excavatum, collected at Rowley Shoals, afforded one known (10) and seven new briaran diterpenes (1), (3) and (5)&#8211;(9). Gross structures and relative stereochemistries were determined by spectroscopic methods and by comparison of spectral data with those of previously reported briarans. Support for a proposed conformation of the 10-membered ring (stabilized by hydrogen-bonding) to explain atypical 1H n.m.r. chemical shifts and coupling constants in (9) was obtained from energy minimization of the proposed structure by an ab initio density functional method. 
