Table 7.
Tentative identification of the compounds in the samples by UPLC-ESI(–)-MS/MS.
| Peak | Rt (min) | [M – H]– | MS Fragments | Tentatively Identified Compounds |
|---|---|---|---|---|
| 1 | 0.56 | 191 | 11, 129, 85/87 | Citric acid |
| 2 | 1.02 | 169 | 125 | Gallic acid |
| 3 | 1.92 | 315 | 153 | Isorhamnetin |
| 4 | 2.35 | 1153 | 865, 577, 289 | Procyanidin oligomer |
| 5 | 2.43 | 577 | 289, 245 | Procyanidin dimer |
| 6 | 2.51 | 1153 | 865, 577, 289 | Procyanidin oligomer |
| 7 | 2.79 | 289 | 245, 205 | (+)-Catechin |
| 8 | 3.01 | 1153 | 865, 577, 289 | Procyanidin oligomer |
| 9 | 3.27 | 1153 | 865, 577, 289 | Procyanidin oligomer |
| 10 | 4.30 | 1153 | 865, 577, 289 | Procyanidin oligomer |
| 11 | 6.73 | 609 | 463, 301 | Rutin (quercetin-3-rutinoside) |
| 12 | 6.75 | 477 | 301, 178, 151 | Quercetin-3-glucuronide |
| 13 | 6.87 | 593 | 447, 285 | Kaempferol-3-O-glucoside-7-rhamnoside |