Table 1.
Phenolic compounds identified in olive tree leaves extracts.
| Peak No. | Retention Time (min) | Measured [M − H]− m/z | Tentative Formula | Mass Error (ppm) | Identification |
|---|---|---|---|---|---|
| 1 | 8.50 | 153.0557 | C8H10O3 | −0.1 | 3-Hydroxytyrosol |
| 2 | 9.19 | 153.0194 | C7H6O4 | 0.5 | 3,4-Dihydroxibenzoic acid |
| 3 | 11.98 | 389.1105 | C16H22O11 | 3.9 | Secologanoside a |
| 4 | 12.44 | 137.0247 | C7H6O3 | 1.8 | 4-Hydroxybenzoic acid |
| 5 | 12.47 | 353.0887 | C16H18O9 | 2.4 | Chlorogenic acid |
| 6 | 15.54 | 151.0403 | C8H8O3 | 1.6 | Vanillin |
| 7 | 16.23 | 609.1480 | C27H30O16 | 3.0 | Rutin |
| 8 | 16.48 | 163.0406 | C9H8O3 | 3.2 | p-Coumaric acid |
| 9 | 16.69 | 447.0953 | C21H20O11 | 4.6 | Luteolin-7-O-glucoside |
| 10 | 16.69 | 701.2317 | C31H42O18 | 2.6 | Oleuropein glucoside a |
| 11 | 16.72 | 463.0897 | C21H20O12 | 3.2 | Quercetin-3-O-glucoside |
| 12 | 17.07 | 577.1585 | C27H30O14 | 3.8 | Apigenin-7-O-rutinoside a |
| 13 | 17.10 | 193.0600 | C10H10O4 | 1.6 | Ferulic acid |
| 14 | 17.14 | 607.1685 | C28H32O15 | 2.7 | Diosmin |
| 15 | 17.24 | 609.1823 | C28H34O15 | −0.3 | Hesperidin |
| 16 | 17.49 | 623.2001 | C29H36O15 | 3.2 | Verbascoside |
| 17 | 17.56 | 539.1790 | C25H32O13 | 3.7 | Oleuropein |
| 18 | 17.68 | 447.0944 | C21H20O11 | 2.5 | Luteolin-7-O-glucoside isomer a |
| 19 | 17.70 | 431.0999 | C21H20O10 | 3.5 | Apigenin-7-O-glucoside a |
| 20 | 18.50 | 377.1245 | C19H22O8 | 0.8 | Oleuropein aglycone |
| 21 | 19.27 | 523.1840 | C25H32O12 | 3.6 | Ligstroside a |
| 22 | 20.64 | 285.0415 | C15H10O6 | 3.7 | Luteolin |
| 23 | 22.24 | 271.0617 | C15H12O5 | 2.0 | Naringenin |
| 24 | 22.32 | 269.0470 | C15H10O5 | 3.8 | Apigenin |
a: tentative assignation, standard not available.