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Retention times, absolute peak area and the main phenolic compounds present in OLE.
| Phenolic compounds | Retention times (min) | Absolute peak area (%) |
|---|---|---|
| Hydroxytyrosol | 4.80 | 1.46 |
| Catechin | 8.40 | 0.04 |
| Vanillic acid | 14.08 | 0.62 |
| Vanillin | 14.69 | 0.04 |
| Rutin | 17.20 | 0.05 |
| Luteolin-7-glucoside | 18.05 | 1.36 |
| Verbascoside | 20.03 | 1.10 |
| Oleuropein | 22.70 | 24.53 |
