Table 2.
Distribution of polyflavonoid oligomers of acetone/water condensed tannin extract of Okoume bark by Maldi-ToF.
| Experimental m/z (Da) | Calculated m/z (Da) | Type unit | Oligomer type |
|---|---|---|---|
| 166.6 | 170.10 | E(gallic acid) | Monomer |
| 179.97 | 180.15 | Gly(Glycosyl unit) | Monomer |
| 257.6 | 258.3 | F1 (trihydroxyflavan) | Monomer |
| 274.4 | 274.3 | A1 (Fisetinidin) | Monomer |
| 305.5 | 306.3 | D1 (Gallocatechin) | Monomer |
| 340.2 | 342.2 | Gly2 (Cellobiose) | Dimer |
| 362.1 | 362.0 | G1H1 (Dihydroxyflavan-3-p-hydroxybenzoate) or F1I1 (Trihydroxyflavan-3-benzoate) | Dimer |
| 405.8 | 404.0 | A1Gly1 | Dimer |
| 422.0 | 420.0 | F1Gly1 | Dimer |
| 438.0 | 436.0 | Q1E1 (Epicatechin-3-gallate) | Dimer |
| 452 | 452 | A1Gly1 | Dimer |
| 481.6 | 480.0 | P2 (Dihydroxyflavan) | Dimer |
| 533.6 | 530 | F1A1 | Dimer |
| 575.2 | 574.6 | A1D1 | Dimer |
| 617 | 616.38 | R1E1 (Isoquercetin-gallate) | Dimer |
| 850.7 | 850.9 | A2D1 | Trimer |
| 851.9 | P1D2 | Trimer | |
| 1012.6 | 1012 | A2DGly1 | Tetramer |
| 1174.4 | 1174 | A2DGly2 | Tetramer |
| 1336.2 | 1336 | A2DGly3 | Pentamer |
| 1498.1 | 1498 | A2DGly4 | Hexamer |
| 1660.1 | 1660 | A2DGly5 | Heptamer |
| 1822.2 | 1822 | A2DGly6 | Octamer |
| 1984.4 | 1984 | A2DGly7 | Nonamer |
| 2146.6 | 2146 | A2DGly8 | Decamer |
| 2309.0 | 2308 | A2DGly9 | Undecamer |
| 2471.0 | 2470 | A2DGly10 | Dodecamer |