Table 2.
Summary of peaks with the highest intensities in MALDI-TOF MS of the condensed tannins from stem bark and fine root of C. equisetifolia.
| Polymer | n1 | n2 | n3 | Calculated | Observed [M + Cs]+ | |
|---|---|---|---|---|---|---|
| [M + Cs]+ | Stem bark | Fine root | ||||
| Trimer | 0 | 3 | 0 | 999 | 999.27 | 999.24 |
| 1 | 2 | 0 | 983 | 983.11 | 983.25 | |
| 0 | 2 | 1 | 1015 | 1015.24 | 1015.25 | |
| 0 | 1 | 2 | 1031 | 1031.24 | 1031.24 | |
| 0 | 0 | 3 | 1047 | 1047.22 | 1046.83 | |
| Tetramer | 0 | 4 | 0 | 1287 | 1287.30 | 1287.28 |
| 1 | 3 | 0 | 1271 | 1271.31 | 1271.25 | |
| 0 | 3 | 1 | 1303 | 1303.30 | 1303.23 | |
| 0 | 2 | 2 | 1319 | 1319.29 | 1319.30 | |
| 0 | 1 | 3 | 1335 | 1335.49 | 1335.20 | |
| 0 | 0 | 4 | 1351 | 1351.39 | 1351.23 | |
| Pentamer | 0 | 5 | 0 | 1575 | 1575.34 | 1575.30 |
| 1 | 4 | 0 | 1559 | 1559.32 | 1559.30 | |
| 0 | 4 | 1 | 1591 | 1591.48 | 1591.33 | |
| 0 | 3 | 2 | 1607 | 1607.49 | 1607.32 | |
| 0 | 2 | 3 | 1623 | 1623.32 | 1623.27 | |
| 0 | 1 | 4 | 1639 | 1640.48 | 1639.30 | |
| Hexamer | 0 | 6 | 0 | 1863 | 1863.34 | 1863.34 |
| 1 | 5 | 0 | 1847 | 1847.37 | 1847.47 | |
| 0 | 5 | 1 | 1879 | 1879.36 | 1879.34 | |
| 0 | 4 | 2 | 1895 | 1895.39 | 1896.45 | |
| 0 | 3 | 3 | 1911 | 1911.34 | -- | |
| 0 | 2 | 4 | 1927 | 1928.68 | -- | |
| Heptamer | 0 | 7 | 0 | 2151 | 2151.41 | 2152.36 |
| 1 | 6 | 0 | 2135 | 2135.39 | 2135.51 | |
| 0 | 6 | 1 | 2167 | 2167.35 | 2167.36 | |
| 0 | 5 | 2 | 2183 | 2183.38 | 2183.31 | |
| 0 | 4 | 3 | 2199 | 2199.36 | 2200.33 | |
| 0 | 3 | 4 | 2215 | 2215.94 | 2215.49 | |
| Octamer | 0 | 8 | 0 | 2439 | 2440.40 | 2439.48 |
| 1 | 7 | 0 | 2423 | 2423.47 | 2423.51 | |
| 0 | 7 | 1 | 2455 | 2456.40 | 2456.28 | |
| 0 | 6 | 2 | 2471 | 2472.51 | 2471.52 | |
| 0 | 5 | 3 | 2487 | 2488.40 | 2489.49 | |
| 0 | 4 | 4 | 2503 | 2504.42 | 2503.56 | |
| Nonamer | 0 | 9 | 0 | 2727 | 2728.39 | 2728.42 |
| 1 | 8 | 0 | 2711 | 2712.39 | 2711.06 | |
| 0 | 8 | 1 | 2743 | 2744.39 | 2744.31 | |
| 0 | 7 | 2 | 2759 | 2760.38 | 2759.47 | |
| 0 | 6 | 3 | 2775 | 2775.42 | 2776.33 | |
| Decamer | 0 | 10 | 0 | 3015 | 3016.44 | 3016.51 |
| 1 | 9 | 0 | 2999 | 3001.36 | 3000.16 | |
| 0 | 9 | 1 | 3031 | 3032.92 | 3032.29 | |
| 0 | 8 | 2 | 3047 | 3048.48 | 3049.47 | |
| 0 | 7 | 3 | 3063 | 3064.37 | -- | |
| 0 | 6 | 4 | 3079 | 3079.48 | -- | |
| Undecamer | 0 | 11 | 0 | 3303 | 3304.19 | 3305.48 |
| 1 | 10 | 0 | 3287 | -- | 3289.40 | |
| 0 | 10 | 1 | 3319 | 3320.75 | 3319.19 | |
| 0 | 9 | 2 | 3335 | 3335.95 | 3335.78 | |
| 0 | 8 | 3 | 3351 | 3351.45 | -- | |
| Dodecamer | 0 | 12 | 0 | 3591 | 3592.75 | 3592.98 |
| 1 | 11 | 0 | 3575 | -- | 3577.91 | |
| Tridecamer | 0 | 13 | 0 | 3879 | 3880.24 | 3880.90 |
| 0 | 12 | 1 | 3895 | -- | 3896.31 | |
| Tetradecamer | 0 | 14 | 0 | 4167 | -- | 4169.66 |
| 0 | 13 | 1 | 4183 | -- | 4184.57 | |
| Pentadecamer | 0 | 15 | 0 | 4455 | 4456.93 | |
n1: Number of afzelechin/epiafzelechin unit; n2: Number of catechin/epicatechin unit; n3: Number of gallocatechin/epigallocatechin unit; “--” means no observed peaks corresponding to those calculated ones.