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. 2015 Aug 13;4(3):548–562. doi: 10.3390/antiox4030548

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Chromatograms obtained by the separation of oil extracts. Peaks: (1) hydroxytyrosol, (2) tyrosol, (3) p-hydroxyphenylacetic acid (internal standard), (4) vanillic acid, (5) p-coumaric, (6) ferulic acid, (7) hydroxytyrosol acetate, (8) dialdehydic form of decarboxymethyl oleuropein aglycone, (9) isomer of dialdehydic form of carboxymethyl oleuropein aglycone, (10) dialdehydic form of decarboxymethyl ligstroside aglycone, (11) pinoresinol, (12) 1-acetoxypinoresinol, (13) luteolin, (14) aldehydic form of oleuropein aglycone, (15) apigenin, (16) aldehydic form of oleuropein aglycone, (17 + 18) aldehydic form of ligstroside aglycone, (OxI) oxidized form of dialdehydic form of oleuropein aglycone, (OxII) oxidized form of dialdehydic form of ligstroside aglycone, (OxIII) oxidized form of aldehydic form of oleuropein aglycone.