
%0 Journal Article
%A Coll, JC 
%A Skelton, BW 
%A White, AH 
%A Wright, AD 
%T Tropical Marine Algae. V. The Structure Determination of Two Novel Sesquiterpenes From the Red Alga <I>Laurencia tenera</I> (Rhodophyceae, Ceramiales, Rhodomelaceae)
%J Australian Journal of Chemistry
%D 1989/10/01
%V 42
%N 10
%P 1695-1703
%K 
%R https://doi.org/10.1071/CH9891695
%U https://www.publish.csiro.au/paper/CH9891695 
%X Laurencia tenera has been shown to contain two novel sesquiterpenes. The structure of the less abundant metabolite (3) was determined by single-crystal X-ray diffraction as (1S,2R,4S,5R,6R,8S,9R)-4,8-dibromo-2,5,6,9-tetramethyltricyclo[7.2.0.01.6] undecane-3-one.&#8225; The more abundant, but less stable metabolite (4) was investigated by extensive high-field N.M.R. spectroscopy. Its structure is proposed as (1S*,2R*,4R*,5R*,6R*,8R*)-4-bromo-2,5,6-trimethyl-11-methylenetricyclo[6.2.1.01.6]undecan-3-one.&#167; The sesquiterpene (3) is isomeric with the known metabolite perforatone (5). 
