Table 1.
UHPLC-PAD-ESI-MS data (UV-vis spectra and detected ions) and MSn (product ions) of compounds detected in EtOH 70% of the aerial parts of E. giganteum.
| Peak | R t (min) | UV (λ max) | UHPLC-MS ions [M-H]− | ESI-IT-MSn | Compound |
|---|---|---|---|---|---|
| 1 | 9.99 | 266, 350 | 787 | 463, 301 | Quercetin-tri-O-hexoside |
| 2 | 10.56 | 265, 344 | 771 | 609, 428, 285 | Kaempferol-3-O-sophoroside-7-O-glu |
| 3 | 11.22 | 254, 366 | 585 | 422, 379, 259 | 3-Hydroxyhispidin-3,4′-di-O-glucoside |
| 4 | 11.61 | 218, 295sh, 327 | 625,07 | 463, 301 | Quercetin-3,7-di-O-glucoside |
| 5 | 11.69 | 278, 305sh, 327 | 625,01 | 463, 301, 255, 178 | Quercetin-3-O-(caffeoyl)-glucoside |
| 6 | 12.08 | 264, 341 | 609 | 447, 327, 285, 255 | Kaempferol-3,7-di-O-glucoside |
| 7 | 13.09 | 270, 361 | 625 | 462, 301 | Flavonol-di-O-hexoside |
| 8 | 13.44 | 254, 331, 369 | 423 | 379, 287, 261, 217 | Equisetumpyrone |
| 9 | 13.53 | 216, 291, 328 | — | 215, 178, 160, 142 | Caffeic acid derivative |
| 10 | 14.04 | 265, 287sh, 341 | 609 | 285 | Kaempferol-3-O-sophoroside |
| 11 | 14.55 | 270, 347 | 463 | 301 | Quercetin-hexoside |
| 12 | 14.82 | 275, 297sh, 331 | 463 | 309, 192, 177, 133 | Ferulic acid derivative |
| 13 | 115.68 | 265, 344 | 447 | 285 | Kaempferol-3-O-glucoside |