
%0 Journal Article
%A Wilkins, AL 
%A Bremer, J 
%A Ralph, J 
%A Holland, PT 
%A Ronaldson, KJ 
%A Jager, PM 
%A Bird, PW 
%T A One- and Two-Dimensional <sup>13</sup>C and <sup>1</sup>H N.M.R. Study of Some Triterpenes of the Hopane, Stictane and Flavicene Groups
%J Australian Journal of Chemistry
%D 1989/02/01
%V 42
%N 2
%P 243-257
%K 
%R https://doi.org/10.1071/CH9890243
%U https://www.publish.csiro.au/paper/CH9890243 
%X The phase sensitive two-dimensional (2D) 13C-1H heteronuclear correlated and double quantum filtered cosy n.m.r. spectra of the triterpenes 7&#946;-acetoxyhopan-22-ol and 2 &#945;,3 &#946;,22 &#945;- triacetoxystictane have been recorded at a resolution sufficient for the complete assignment of their proton resonances. Revisions to some of the methylene proton resonances of 7&#946;-acetoxyhopan-22-ol proposed elsewhere are discussed, and assignments for a series of flavicene and stictane  triterpenes are presented. 2D, n.m.r. analyses of a new triterpene isolated from the extracts of the lichen Pseudocyphellaria coronata revealed it to be 22  &#945;-hydroxystictano-25,3 &#946; lactone. 
