Table 1.
ESVR chemical profile as analyzed by UFLC-MS (negative mode).
| Peak | Retention time | UV | Molecular formula | (M-H) | PPM error | MS/MS | Compound |
|---|---|---|---|---|---|---|---|
| 1 | 1.1 | — | C12H20O11 | 341.1086 | 0.6 | 341: 179 | Sugar derivative |
| 2 | 4.2 | 270 | C15H14O7 | 305.0657 | 3.2 | 305: 261, 221, 219, 179, 167, 165 | Gallocatechin |
| 3 | 8.6 | 270 | C15H14O8 | 305.0660 | 2.3 | 305: 261, 221, 219, 179, 167, 165 | Epigallocatechin |
| 4 | 9.1 | 280 | C15H14O9 | 289.0709 | 3.0 | 289: 245, 205, 203 | Catechin |
| 5 | 12.5 | 280 | C15H14O10 | 289.0714 | 1.3 | 289: 245, 205, 203 | Epicatechin |
| 6, 7, 8 | 12.5/13.5/14.6 | 278 | C30H26O11 | 561.1402/561.1402 | 1.1 | 561: 407, 305, 177, 165 | Butiniflavan-(epi)gallocatechin |
| 9, 10 | 16.1/17.6 | 280 | C30H26O10 | 545.1453/545.1445 | 0.7 | 545: 391, 289, 245 | Butiniflavan-(epi)catechin |
| 11 | 18 | 289/321 | C14H12O4 | 243.0662 | 0.3 | 243: 201, 159 | Piceatannol |
| 12, 13, 14, 15 | 19.6/20/20.4/20.7 | 280 | C30H26O10 | 545.1441 | 2.3 | 545: 305, 239, 165 | Cassiaflavan-(epi)gallocatechin |
| 16, 17, 18, 19, 20 | 22.2/22.7/23.2/23.5/24.9 | 280 | C30H26O9 | 529.1488 | 3.0 | 529: 289, 245, 239, 203 | Cassiaflavan-(epi)catechin |
| 21 | 36.1 | 279/320/406 | C34H34O12 | 633.1992 | 2.2 | 633: 615, 597, 579, 557, 555, 539, 317, 299, 298, 259 | Dimeric tetrahydroanthracene derivative |