Table 1.
Proposed compounds from ESI(−)FT-ICR MS analyzes
| Suggested compounds | Class of natural product | EtOAc fraction | n-BuOH fraction | EtOAc-Pp | m/z theoretical | m/z measured | Molecular formula (M) | Error (ppm) | DBE |
|---|---|---|---|---|---|---|---|---|---|
| Kaempferol | Flavonol | + | - | + | 285.04046 | 285.04042 | C15H10O6 | 0.41 | 11 |
| Quercetin | Flavonol | + | - | + | 301.03538 | 301.03538 | C15H10O7 | 0.25 | 11 |
| Rhamnetin/isorhamnetin | Flavonol | + | + | 315.05103 | 315.05098 | C16H12O7 | 0.33 | 11 | |
| Quercetin pentoside | Flavonol Monoglycoside | + | + | + | 447.09329 | 447.10361 | C21H20O11 | 0.38 | 12 |
| Quercetin hexoside | Flavonol Monoglycoside | + | + | + | 463.08820 | 463.08801 | C21H20O12 | 0.38 | 12 |
| Tricetin-4′-methoxy-3′-â-D-glucoside1 | Flavone Monoglycoside | + | + | + | 477.10385 | 477.10361 | C22H22O12 | −0.12 | 12 |
| - | Flavan-3-ol dimer | + | - | + | 529.15041 | 529.15024 | C30H26O9 | 0.51 | 18 |
| - | Flavan-3-ol dimer | + | - | + | 545.14532 | 545.14519 | C30H26O10 | 18 | |
| - | Flavan-3-ol dimer | + | - | - | 561.14024 | 561.08601 | C30H26O11 | 0.45 | 18 |
| Flavan-3-ol dimer | + | - | - | 591.11441 | 591.09653 | C30H24O13 | 0.40 | 19 | |
| Vicenin-2 kaempferol diglycoside1 | Flavone diglycoside | - | + | + | 593.15120 | 593.15104 | C27H30O15 | −0.08 | 13 |
| Quercetin dihexoside | Flavonol diglycoside | - | + | + | 609.14611 | 609.14591 | C27H30O16 | 0.06 | 13 |
| - | Flavan-3-ol trimer | - | - | + | 769.22905 | 769.22868 | C45H38O12 | 0.08 | 27 |
| Flavan-3-ol trimer | - | - | + | 785.22397 | 785.22349 | C45H38O13 | 0.08 | 27 |
1Purified compounds identified by NMR, DBE - double bond equivalent, + detected, − not detected, Mass error (ppm) = [(m/z measured – m/z theoretical)/m/z theoretical]*106.