Table 3.
Peak assignment using UPLC-PDA-ESI-MS of metabolites detected in the chloroform fraction (negative mode).
| Peak | Retention Time | Identified Compd. | UV-Vis (λ Max) | [M − H]− (m/z) |
Fragment Ions (m/z) | Percentage (%) | Ref. |
|---|---|---|---|---|---|---|---|
| Kp19 | 3.5 | Hexahydroxydiphenoyl (HHDP)-galloylglucose | 274 | 633 | 301, 257, 229 | 5.4 | [26] |
| Kp20 | 5.18 | Dihydroxy-4-methoxyl isoflavan | 226, 284 | 271 | 227, 135 | 3.75 | [27] |
| Kp21 | 5.2 | Gallocatechin | 274 | 305 | 179 | 1.29 | [17] |
| Kp22 | 6.2 | HHDP-galloylglucose | 274 | 633 | 301, 257, 229 | 1.3 | [26] |
| Kp23 | 6.9 | Trihydroxyphenethyl-O-rhamnopyranosyl-(1-6)-4-O-caffeoyl-glucopyranoside | 232, 282 | 621 | 487, 469 | 3.4 | [19] |
| Kp24 | 7.38 | unidentified | 230, 290 | 604 | 582, 462, 342 | 2.38 | [28] |
| Kp25 | 9.2 | Methylretusin | 230, 283 | 297 | 281, 239 | 0.18 | [27] |
| Kp26 | 9.35 | Acyl-feruloyl-4-O-caffeoyl-quinic acid | 220, 232 | 571 | 277, 191 | 0.95 | [15] |
| Kp27 | 12.08 | Glycycoumarin hydroxylate glucuronide | 258 | 559 | 338 | 3.29 | [22,23] |
| Kp28 | 12.65 | Sulfate conjugate of glycycoumarin | 283 | 447 | 367 | 2.01 | [22,23] |
| Kp29 | 14.78 | trisgalloyl (hexahydroxydiphenoyl) glucose derivative | 275 | 907 | 765,191 | 0.72 | [29] |