Table 4.
Identification of polyphenolic compounds in O. sanctum leaves extract
| Fraction | Calculated MW | Negative ion mode | Positive ion mode | Compound detecteda | Molecular Formula |
|---|---|---|---|---|---|
| OsE | 594 | – | 595 | Vicenin 2 | C27H30O15 |
| 462 | 461 | 463 | Luteolin-7-O-glucuronide | C21H18O12 | |
| 448 | 447 | – | Isorientin, Orientin, Galuteolin | C21H20O11 | |
| 446 | 445 | 447 | Apigenin-7-O-glucuronide | C21H18O11 | |
| 432 | 431 | – | Vitexin, Isovitexin | C21H20O10 | |
| 360 | 359 | – | Rosmarinic acid | C18H16O8 | |
| 354 | 353 | – | Chlorogenic acid | C16H18O9 | |
| 340 | 339 | – | Aesculin | C15H16O9 | |
| 302 | 301 | 303 | Quercetin | C15H10O7 | |
| 286 | 285 | – | Luteolin | C15H10O6 | |
| 270 | 269 | – | Apigenin | C15H10O5 | |
| 180 | 179 | – | Caffeic acid | C9H8O4 | |
| OsB | 462 | 461 | 463 | Luteolin-7-O-glucuronide | C21H18O12 |
| 446 | 445 | – | Apigenin-7-O-glucuronide | C21H18O11 | |
| 360 | 359 | – | Rosmarinic acid | C18H16O8 | |
| 354 | 353 | 355 | Chlorogenic acid | C16H18O9 | |
| 286 | 285 | – | Luteolin | C15H10O6 | |
| 270 | 269 | – | Apigenin | C15H10O5 | |
| 180 | 179 | – | Caffeic acid | C9H8O4 | |
| OsR | 314 | 313 | – | Cirsimaritin | C17H14O6 |
aSamples tentatively identified by mass spectral data