Article ID Journal Published Year Pages File Type
1210377 Journal of Chromatography A 2006 6 Pages PDF
Abstract

Resveratrol, trans-ɛ-viniferin and trans-δ-viniferin are the major stilbenes induced in downy mildew infected grapevine leaves. In addition, nine minor polyphenolic compounds, described as stilbenes derivatives, have been separated and detected among known stilbenes after a methanolic microextraction of small pieces (1–2 mg) from infected grapevine leaves with a rapid, qualitative and optimized HPLC method coupled to mass spectrometry using atmospheric pressure photoionisation (APPI–MSn). The characterization of unknown stilbenic derivatives as six resveratrol dimers, two dimethylated resveratrol dimers and a resveratrol trimer are reported. Therefore, structures have been proposed for the dimethylated resveratrol dimers. Use of an easy sample treatment and the LC–APPI–MSn method results in spectral data of these minor naturally occurring viniferin analogues.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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