Table 3.
Identification of secondary metabolites in methanol extract of F. japonica by LC-ESI/MS.
| Peak | RT (min) |
[M−H]−
(m/z) |
Other ions (m/z) |
Compound | % |
|---|---|---|---|---|---|
| 1 | 2.6 | 290 | — | Unknown | 14.2 |
| 2 | 8.8 | 389 | — | Polydatin | 22.4 |
| 3 | 12 | 541 | — | Polydatin gallate | 3 |
| 4 | 14.4 | 431 | — | Apigenin-7-glucoside | 2 |
| 5 | 15.7 | 227 | — | Resveratrol | 2.55 |
| 6 | 18.5 | 407 | 245[M − H-glu]− | Torachrysone-8-O-β-glucoside | 4.23 |
| 7 | 19.7 | 431 | — | Emodin-8-β-D-glucoside | 11.1 |
| 8 | 24.2 | 445 | 283[M − H-glu]− | Physcion-8-β-D-glucoside | 2.9 |
| 9 | 26.3 | 285 | — | Hydroxyemodin | 1.6 |
| 10 | 35.2 | 283 | — | Rhein | 5.2 |
| 11 | 44.8 | 269 | — | Emodin | 29.6 |
| 12 | 48.3 | 283 | — | Physcion | 1.2 |