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Example of NMR spectrum (400 MHz) of the aldehydic region of a typical olive oil extract depicting the selected peaks that were used for integration: oleocanthal (5), oleacein (6), ligstroside aglycon monoaldehydic form (7), oleuropein aglycon monoaldehydic form (8) oleokoronal (9), oleomissional (10). IS: internal standard (syringaldehyde).
