Table 1.
Identification of phenolic compounds in ethanol extract from leaves of C. scolymus using their retention times, LC/MS, and LC–MS/MS data.
| Peaka | RT (min) | m/z | Mode (+/-) | ƛ max (min) | MS/MS | Tentative ID |
|---|---|---|---|---|---|---|
| 1 | 3.00 | 122.3 | + | 200-700 | 82 | Salicylic acid-o-hexoside |
| 2 | 3.7 | 117.2 | - | 200-700 | 100 | Chlorogenic acid |
| 3 | 4.2 | 112 | - | 200-700 | 214.8, 178.8, 352.8 | 3-mono-o-cafeoylquinic acid |
| 4 | 5.3 | 141 | - | 200-700 | 265.9 | Apigenin-7-glucoside |
| 5 | 8.4 | 223 | - | 200-700 | 331.4 | Unknown |
| 6 | 10.30 | 275 | - | 200-700 | 529.7, 350.8, 284.7 | Luteolin-7-o-rutinoside |
| 7 | 13.5 | 327.1 | - | 200-700 | 170.9 | Dihydroxypropiophend-hexoside |
| 8 | 14.8 | 395 | - | 200-700 | 529.7, 288. 9,307 | Kampferol 3-o-rutinoside |
| 9 | 16.2 | 431 | - | 200-700 | 434.7, 294.9, 344.8 | Quercetin-o-pentoside |
| 10 | 23.3 | 623 | - | 200-700 | 255.1 | Caffeic acid |
Identification was aided by comparison with reference standards that were available and by correlation with previous literature reports.
a Peak numbers and retention times (Rt) refer to LC/MS chromatograms in Figure 2.