Table 2.
HPLC-DAD and MS/MS data of phenolic compounds and triterpenoids in an ethyl acetate extract of the stem wood of T. brownii.
| Peak No | Rt (min) | [M-H] (m/z) | CID Mn
Main Fragment Ions (m/z) |
Identified Compound | Molecular Formula | Exact Mass (Calc.) |
|---|---|---|---|---|---|---|
| 1 | 6.8 | 469 | 425, 407, 379, 353, 300, 271 | oleanane type triterpenoid | - | - |
| 2 | 6.8 | 491 | 447, 429, 411, 401, 385, 301 | oleanane type triterpenoid | - | - |
| 3 | 11.1 | 541 | 532, 425, 397, 301, 273, 227, 199, 169 | cis-resveratrol-3-O-β-galloyl-glucoside | C27H26O12 | 542.1416 |
| 4 | 13.2 | 541 | 532, 424, 407, 300, 275, 227, 199, 169 | trans-resveratrol-3-O-β-galloyl-glucoside | C27H26O12 | 542.1416 |
| 5 | 14.1 | 483 | 451, 433, 407, 305, 405, 377 | Methyl-(S)-flavogallonate | C22H12O13 | 484.0273 |
| 6 | 14.4 | 601 | 583, 301, 299, 271, 243, 215 | Gallagic acid dilactone | C28H10O16 | 601.9964 |
| 7 | 15.3 | 433 | 300, 314, 229, 271, 132 | Naringenin-4′-methoxy-7-pyranoside | - | - |
| 8 | 16.8 | 625 | 301, 284, 256, 229, 201,185, 129 | Quercetin-7-β-O-diglucoside | C27H30O17 | 626.1473 |
| 9 | 18.2 | 633 | 481, 463, 421, 387, 305, 275, 300, 169 | Corilagin derivative | - | - |
| 10 | 18.4 | 585 | 301, 284, 257, 229, 201, 185, 153, 132 | Quercetin-7-O-galloyl-glucoside | - | - |
| 11 | 19.1 | 725 | 665, 503, 409, 441, 379, 391 | Unknown ellagitannin | - | - |
| 12 | 25.5 | 343 | 328, 313, 298, 285, 270, 257 | 5,6-dihydroxy-3′,4′,7-trimethoxy-flavone | - | - |
Rt, retention time in HPLC-DAD; [M-H ]− (m/z), base or molecular ions at negative mode; CID Mn, Fragmentation ions resulting from collision-induced dissociation; The exact mass (calc.) according to the molecular formula of identified compounds. Aglycones are underlined. Peak numbers according to Figure 3.