Table 3.
Composition of Fr40 determined by HPLC-ESI-MS.
| Peak | RT (min) | % | λmax (nm) | MS1 (−) (m/z) |
MS (m/z) | Propose struture |
|---|---|---|---|---|---|---|
| 1 | 24.8 | 1.02 | 269, 335 | 593.1495 | 593,150(100), 217.004(60) | Isovitexin-7-O-glucoside |
| 2 | 26.1 | 5.41 | 241, 342 | 447.0932 | 447.093(100), 217.004(16) | Isoorientin |
| 3 | 26.9 | 35.79 | 243, 347 | 461.1094 | 461.109(100) | Swertiajaponin |
| 4 | 30.2 | 1.21 | 269, 335 | 577.1546 | 577.155(100), 461.108(39), 217.004(49) | Isovitexin-O-rhamnoside |
| 5 | 30.6 | 2.07 | 240, 335 | 431.0979 | 431.098(100), 217.004(30) | Isovitexin |
| 6 | 31.2 | 7.86 | 271, 336 | 591.1709 | 591.171(100), 445.114(8), 217.004(4) | Swertisin-O-rhamnoside |
| 7 | 31.5 | 37.34 | 270, 336 | 445.1144 | 445.114(100) | Swertisin |
| 8 | 33.1 | 9.29 | 270, 345 | 475.1244 | 475.124(100), 217.004(4) | Isoorientin 7,3′-dimethylether |
RT retention time (min); peak of identified compounds.