Table 2.
Collected fractions from a commercial lemon verbena extract (PLX®10) by semi-preparative chromatography, indicating the major compound(s) identified by HPLC-ESI-TOF-MS, the dry weight of the residue of each fraction and the relative amount taking account the injected quantity. Bold numbers correspond to the peaks with the highest intensity in each isolated fraction.
| Fraction | Peak(s) | Major Compound(s) | Residue Weight (mg) | Relative Amount (%) |
|---|---|---|---|---|
| F1 | 1 | Shanziside | 0.7 | 2.8 |
| F2 | 2, 3 | Gardoside | 1.0 | 4.0 |
| F3 | 4 | Verbasoside | 0.9 | 3.6 |
| F4 | 5, 6, 7, 8 | Cistanoside F isomers | 0.5 | 2.0 |
| F5 | 8, 9, 10 | Loganic and epiloganic acids | 0.9 | 3.6 |
| F6 | 11 | Shanziside methyl ester | 0.6 | 2.4 |
| F7 | 12 | Theveside | 0.6 | 2.4 |
| F8 | 13, 14, 15, 16, 17 | Tuberonic acid glucoside + UK | 0.6 | 2.4 |
| F9 | 17, 18, 19 | UK | 0.4 | 1.6 |
| F10 | 17, 18, 19 | β-hydroxy(iso)verbascoside | 0.4 | 1.6 |
| F11 | 20 | Luteolin-7-diglucuronide | 0.5 | 2.0 |
| F12 | 20, 21 | Luteolin-7-diglucuronide | 0.2 | 0.8 |
| F13 | 22, 23, 26, A | Verbascoside | 2.3 | 9.2 |
| F14 | 24, 25 | Chrysoeriol-7-diglucuronide | 0.9 | 3.6 |
| F15 | 26, A | Isoverbascoside | 1.1 | 4.4 |
| F16 | A, 27, 28 | Forsythoside A | 0.7 | 2.8 |
| F17 | 29 | Acacetin-7-diglucuronide | 0.4 | 1.6 |
| F18 | 30, B | Martynoside | 0.7 | 2.8 |
| F19 | B, C | Osmanthuside B | 0.3 | 1.2 |