Demonstration of long-chain n-alkyl caffeates and Delta(7)-steryl glucosides in the bark of Acacia species by gas chromatography-mass spectrometry

resumo

The GC-MS identification of several abundant long-chain aliphatic n-alkyl caffeates, together with other phydroxycinnamic acid esters, in the dichloromethane extracts of the bark of Acacia dealbuta and A. melanoxylon, is reported. In addition, the unambiguous differentiation between two Delta(7)-steryl glucosides (namely, spinasteryl glucoside and dihydrospinaster-yl glucosides) and the homologous Delta(5)-steryl glucosides was achieved based on the EI-MS fragmentation features of their trimethylsilyl derivatives. Copyright (c) 2007 John Wiley & Sons, Ltd.

palavras-chave

EUCALYPTUS-GLOBULUS; WOOD; ESTERS; IDENTIFICATION

categoria

Biochemistry & Molecular Biology; Plant Sciences; Chemistry

autores

Freire, CSR; Silvestre, AJD; Neto, CP

nossos autores

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