Table 4.
Compounds with biological activity identified in O. robusta extract in negative ion mode.
| Compound | Formula | Adduct | m/z | Retention Time (min) |
|---|---|---|---|---|
| Lactones | ||||
| D-Glucaro-1,4-lactone | C6H8O7 | M-H | 191.0223 | 1.616 |
| Cinnamic acids and derivatives | ||||
| 1-O-Sinapoylglucose | C17H22O10 | M-H | 385.1205 | 11.743 |
| Benzene and derivatives | ||||
| Vanillic acid | C8H8O4 | M-H | 167.0382 | 7.284 |
| 2-O-Galloyl-1,4-galactarolactone | C13H12O11 | M+K-2H | 380.9824 | 21.898 |
| Carboxylic acids and derivatives | ||||
| 2-O-Caffeoylhydroxycitric acid | C15H14O11 | M+Na-2H | 391.0282 | 1.486 |
| Organooxygen compounds | ||||
| Cis-5-Caffeoylquinic acid | C16H18O9 | M+K-2H | 391.0376 | 1.099 |
| trans-o-Coumaric acid 2-glucoside | C15H18O8 | M+H-H2O | 309.0968 | 6.176 |
| trans-p-Coumaric acid 4-glucoside | C15H18O8 | M+H-H2O | 309.0969 | 6.176 |
| 6-Caffeoylsucrose | C21H28O14 | M-H | 503.138 | 7.902 |
| Gentiobiosyl 2-methyl-6-oxo-2E,4E-heptadienoate | C20H30O13 | M-H | 477.159 | 9.398 |
| Glucocaffeic acid | C15H18O9 | M-H | 341.0926 | 10.455 |
| Coumarins and derivatives | ||||
| Rutaretin 9-rutinoside | C26H34O14 | M+FA-H | 615.202 | 6.665 |
| Fatty acyls | ||||
| 1-Hexanol arabinosylglucoside | C17H32O10 | M+Na-2H | 417.171 | 7.902 |
| Flavonoids | ||||
| Hesperetin 5-O-glucoside | C22H24O11 | M-H | 463.1337 | 9.038 |
| Phenol lipids | ||||
| Caryoptosidic acid | C16H24O11 | M-H2O-H | 373.119 | 9.578 |
| Hydroxyisonobilin | C20H26O6 | M-H | 361.1717 | 17.079 |
| Furanoid lignans | ||||
| Divanillyltetrahydrofuran ferulate | C30H32O8 | M+FA-H | 565.197 | 16.022 |
| Phenols | ||||
| 5-Hydroxyconiferyl alcohol | C10H12O4 | M-H | 195.0701 | 16.382 |
| Betalains | ||||
| Betalamic acid | C9H9NO5 | 2M-H | 211.0525 | 4.321 |
| Vulgaxanthin I | C14H17N3O7 | M+FA-H | 384.1014 | 6.744 |
| Betanin | C24H26N2O13 | 2M-H | 1099.287 | 7.852 |
| Betalamic acid | C9H9NO5 | M-H2O-H | 192.0344 | 8.909 |