Table 2.
Main phenolic compounds annotated by UHPLC-APCI-MS/MS in bark ethanol extract (#76) before the clean-up step.
| Compound | Class | Compound Molecular Formula |
Rt (min) |
[M-H]− m/z |
MS2 | λmax | Reference |
|---|---|---|---|---|---|---|---|
| 7 | flavonoid |
C-glycosylated flavonoid (UI) * |
0.96 | 621.4 | 603 (M-H-H2O), 531 (M-H-90), 501 (M-H-120) 441 2x (M-H-90), 381 2x (M-H-120) |
295 | - |
| 8 | chalcone | 3′,5′di-C-glucosyl phloretin C27H34O15 |
0.96 | 597.5 | 579 (M-H-H2O), 507 (M-H-90), 477 (M-H-120) 417 2x (M-H-90), 357 2x (M-H-120) |
285 | [40] |
| 9 | flavonol | quercetin 3-O-deoxyhexoside C21H20O11 |
0.98 | 465.7 [M-H +H2O]− adduct |
319 (-dHex), 301 (-dHex-H2O) 283 (-dHex-2H2O) 255 (-dHex-2H2O -CO) |
255, 355 | [41] |
* UI: Unidentified.