Table 5.
Retention time (tR ) and MS2 fragment ions of eight alkaloids identified in Ch. majus.
| Compounds | Formular | tR (min) | [M + H]+ | [M]+ | MS2 |
|---|---|---|---|---|---|
| Magnoflorine | C20H24NO4 | 0.70 | - | 342 | 297,282,265,237,222 |
| Protopine | C20H20NO5 | 1.63 | 354 | - | 336,305,293,275,247,188 |
| Chelidonine | C20H20NO5 | 1.89 | 354 | - | 336,323,305,275,189 |
| Coptisine | C19H14NO4 | 2.00 | - | 320 | 292,277,262,249 |
| Allocryptopine | C21H24NO5 | 2.02 | 370 | - | 352,336,306,290,188 |
| Sanguinarine | C20H14NO4 | 2.70 | - | 332 | 317,304,289,274 |
| Berberine | C20H18NO4 | 3.07 | - | 336 | 321,320,206,292,278 |
| Chelerythrine | C21H18NO4 | 3.93 | - | 348 | 332,318,304,290 |