title: Demonstration of long-chain n-alkyl caffeates and delta7-steryl glucosides in the bark of Acacia species by gas chromatography-mass spectrometry.
abstract: 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 dealbata and A. melanoxylon, is reported. In addition, the unambiguous differentiation between two delta7-steryl glucosides (namely, spinasteryl glucoside and dihydrospinasteryl glucosides) and the homologous delta5-steryl glucosides was achieved based on the EI-MS fragmentation features of their trimethylsilyl derivatives.
authors: Centre of Research in Ceramics and Composite Materials, University of Aveiro, 3810-193 Aveiro, Portugal.
authors: Carmen S R
authors: CS
authors: Freire
authors: Armando J D
authors: AJ
authors: Silvestre
authors: Carlos Pascoal
authors: CP
authors: Neto
mesh_terms: D000045:Acacia / Q000737:chemistry*; D002109:Caffeic Acids / Q000737:chemistry*; D005233:Fatty Alcohols / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D005960:Glucosides / Q000737:chemistry*; D008752:Methylene Chloride; D024301:Plant Bark / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012997:Solvents; D021241:Spectrometry, Mass, Electrospray Ionization; D014297:Trimethylsilyl Compounds / Q000032:analysis
chemical_list: D002109:Caffeic Acids; D005233:Fatty Alcohols; D005960:Glucosides; D010936:Plant Extracts; D012997:Solvents; D014297:Trimethylsilyl Compounds; D008752:Methylene Chloride