Table 2.
Identification and quantification of phenolic compounds in OFS and OFG ethanolic extracts. Rt–retention time; [M + H]+–molecular ion; UV λmax–maximum absorption wavelength in the visible region.
| Subclass | Peak No. | Rt (min) | [M + H]+ (m/z) | UV λmax (nm) | Compound | OFS | OFG |
|---|---|---|---|---|---|---|---|
| Concentration (μg/mg) | |||||||
| Tyrosol | 1 | 3.05 | 181 | 274 | Tyrosol acetate | 1.586 | 3.185 |
| Tyrosol | 2 | 9.68 | 139 | 280 | Tyrosol | 1.132 | 0.682 |
| Tyrosol | 3 | 15.45 | 625 | 349.250 | Verbascoside | 5.537 | 8.877 |
| Tyrosol | 4 | 15.75 | 527 | 295 | Demethyloleuropein | 5.069 | 5.271 |
| Flavone | 5 | 16.08 | 449 | 350.249 | Luteolin 6-C-glucoside | 8.915 | 20.246 |
| Tyrosol | 6 | 16.64 | 525 | 320.240 | Lingstroside | 2.014 | 4.354 |
| Flavone | 7 | 17.54 | 449 | 350.249 | Luteolin 7-O-glucoside | 10.171 | 20.959 |
| Flavone | 8 | 17.82 | 463 | 350.250 | Luteolin-glucuronide | 2.821 | 8.437 |
| Tyrosol | 9 | 18.49 | 541 | 281 | Oleuropein | 13.220 | 17.446 |
| Tyrosol | 10 | 19.05 | 379 | 280 | Oleuropein aglicone | 4.890 | 5.257 |
| Flavone | 11 | 21.32 | 287 | 350.249 | Luteolin | 1.379 | 4.513 |
| Total | 56.733 | 99.228 | |||||