Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 351195
Title Syringa oblata Lindl var. alba as a source of oleuropein and related compounds
Author(s) Nenadis, N.; Vervoort, J.J.M.; Boeren, J.A.; Tsimidou, M.Z.
Source Journal of the Science of Food and Agriculture 87 (2007)1. - ISSN 0022-5142 - p. 160 - 166.
Department(s) Biochemistry
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) radical scavenging activity - olea-europaea leaves - phenolic-compounds - antioxidant activity - liquid-chromatography - olive oil - hydroxytyrosol - glucosides
Abstract The leaf methanol extract of Syringa oblata Lindl var. alba was investigated as a source of oleuropein and related compounds. The extract had a high total phenol content and a radical scavenging activity similar to that of the respective extract from Olea europaea leaves. HPLC-DAD characterisation of the two most abundant phenolic compounds in the extract of S. oblata indicated that both had UV spectra matching that of oleuropein. The presence of oleuropein was verified by using LC-MS. Identification of the second compound was only feasible after isolation (preparative HPLC) and spectroscopic characterisation [LC-MS, 1H NMR and homonuclear two-dimensional correlated spectroscopy (COSY)]. The compound identified was the known bioactive syringopicroside. On the basis of MS data other peaks were assigned to oleuropein aglycone, verbascoside, ligstroside and syringopicroside derivatives, as well as to a luteolin rutinoside. The findings are promising for the potential exploitation of S. oblata leaf extract as a source for oleuropein and other bioactive ingredients
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