Chemical composition of the epicuticular wax from the fruits of Eucalyptus globulus

resumo

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.

palavras-chave

LEAF WAXES; CONSTITUENTS; TRITERPENOIDS

categoria

Biochemistry & Molecular Biology; Plant Sciences; Chemistry

autores

Pereira, SI; Freire, CSR; Neto, CP; Silvestre, AJD; Silva, AMS

nossos autores

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".