Extractives of Australian Timbers. XIII. Jingullic Acid, a Triterpene of the Lupane Series Containing a C28- 29 Lactone Group 

 -  Australian Journal of Chemistry, 26(4), p.831-837, 1973 .
<br/><br/> Jingullic acid, a nor-triterpene isolated from Emmenospevmurn alphitonioides F. Muell., has been shown to possess structure (5), 19P-hydroxy-~(1)-norlupa-2,20(29)- diene-27,28-dioic acid 28,198-lactone, by chemical and spectroscopic investigation and by convergent synthesis from ceanothenic acid.