Chemical composition of the epicuticular wax from the fruits of Eucalyptus globulus
authors Pereira, SI; Freire, CSR; Neto, CP; Silvestre, AJD; Silva, AMS
nationality International
journal PHYTOCHEMICAL ANALYSIS
author keywords GC-MS; hydrolysis; 8-desmethyleucalyptin; sesamin; tritriacontan-16,18-dione; ursolic acid; 3 beta-hydroxyurs-11-en-13 beta(28)-olide; 3 beta,11 alpha-dihydroxyurs-12-en-28-oic acid; epicuticular wax; fruits; Eucalyptus globulus
keywords LEAF WAXES; CONSTITUENTS; TRITERPENOIDS
abstract The chemical composition of the epicuticular wax from the fruits of Eucalyptus globulus was studied by GC-MS before and after alkaline hydrolysis. The wax had two main components, ursolic acid and tritriacontan-16,18-dione, together with several other triterpenic acids. After alkaline hydrolysis, a large increase in the amounts of triterpenic acids and fatty acids (particularly in hexadecanoic acid) was observed, suggesting that these components were present predominantly in esterified forms in the fruit wax. Six compounds were isolated from the fruits by preparative chromatography, and were identified as 8-desmethyleucalyptin, sesamin, tritriacontan-16,18-dione, ursolic acid, 3 beta-hydroxyurs-11-en-13 beta(28)-olide (ursolic acid lactone) and 3 beta,11 alpha-dihydroxyurs-12-en-28-oic acid, the latter of which was identified for the first time. Copyright (c) 2005 John Wiley & Sons, Ltd.
publisher JOHN WILEY & SONS LTD
issn 0958-0344
year published 2005
volume 16
issue 5
beginning page 364
ending page 369
digital object identifier (doi) 10.1002/pca.859
web of science category Biochemical Research Methods; Plant Sciences; Chemistry, Analytical
subject category Biochemistry & Molecular Biology; Plant Sciences; Chemistry
unique article identifier WOS:000232294900011
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