Table 6.
Polyphenolic compounds detected in Z. lotus (MeOH-H2O extract) by HPLC-DAD-ESI/MS.
| Peak | Tentative Identification | tR (min) | Identification Type |
λMAX (nm) | m/z | Fragments |
|---|---|---|---|---|---|---|
| Organic acid | ||||||
| 1 | Malic acid derivative | 2.51 | DAD/MS | - | 503 | 191,133 |
| Phenolic acid and derivatives | ||||||
| 3 | Galloyl shikimic acid | 15.3 | DAD/MS | 252–286 | 325 | |
| Flavan-3-ols | ||||||
| 2 | (-)-Catechin 3-O-gallate | 7.35 | DAD/MS | 258 | 441 | - |
| Flavonols | ||||||
| 4 | Quercetin rhamnosyl-rhamnosyl-glucoside | 24.98 | DAD/MS | 253–357 | 755 | 303+ |
| 5 | Quercetin di-glucoside | 25.25 | DAD/MS | 254–357 | 625 | 303+ |
| 7 | Quercetin rhamnoside-glucoside | 28.53 | DAD/MS | 286 | 609 | 303+ |
| 8 | Eriodictyol derivative | 29.80 | DAD/MS | 285 | 597 | 287 |
| Non-identified | ||||||
| 6 | Unknown | 26.51 | DAD/MS | 351 | 613 | - |
| 9 | Unknown | 31.31 | DAD/MS | 255–352 | 141 | - |
| 10 | Unknown | 43.02 | DAD/MS | 277–373 | 698 | - |