Table 1.
Peak assignments for the analysis of the extract from S. doederleinii.
| Peak No. | tR (min) | Identification | (−)ESI–MS m/z | Formula | |
|---|---|---|---|---|---|
| Observed | Calculated (Δppm) | ||||
| 1 | 17.4 | Amentoflavone | 537.082 | 537.0827 (−1.30) | C30H18O10 |
| 2 | 19.6 | Robustaflavone | 537.0815 | 537.0827 (−2.23) | C30H18O10 |
| 3 | 22.8 | 2′,8′′-Biapigenin | 537.0824 | 537.0827 (−0.56) | C30H18O10 |
| 4 | 25.6 | 2′′,3′′-Dihydro-3′, 3′′′-biapigenin | 539.0974 | 539.0984 (−1.85) | C30H20O10 |
| 5 | 27.9 | 3′,3′′′-Binaringenin | 541.113 | 541.114 (−1.85) | C30H22O10 |
| 6 | 28.9 | Bilobetin | 551.0977 | 551.0984 (−1.27) | C31H20O10 |
| 7 | 31.6 | 4′′′-Dehydroxyamentoflavone a | 521.0871 | 521.0878 (−1.34) | C30H18O9 |
| 8 | 33.0 | Delicaflavone | 537.0822 | 537.0827 (−0.93) | C30H18O10 |
| 9 | 33.6 | Hinokiflavone | 537.0819 | 537.0827 (−1.49) | C30H18O10 |
| 10 | 34.2 | 2,3-Dihydrohinokiflavone a | 539.0974 | 539.0984 (−1.85) | C30H20O10 |
| 11 | 34.8 | Chrysocauloflavone I | 539.0976 | 539.0984 (−1.48) | C30H20O10 |
| 12 | 37.2 | 2′′,3′′-Dihydro-3′,3′′′-biapigenin methyl ether a | 553.1134 | 553.114 (−1.08) | C31H22O10 |
| 13 | 37.8 | 3′,3′′′-Binaringenin methyl ether a | 555.1285 | 555.1297 (−2.16) | C31H24O10 |
| 14 | 39.7 | Isoginkgetin | 565.1133 | 565.114 (−1.24) | C32H22O10 |
| 15 | 40.5 | Robustaflavone 7,4′-dimethyl ether a | 565.1135 | 565.114 (−0.88) | C32H22O10 |
| 16 | 43.4 | 2,3-Dihydroisocryptomerin a | 553.1132 | 553.114 (−1.45) | C31H22O10 |
| 17 | 46.5 | 4′,7′′,4′′′-Trimethylamentoflavone a | 579.1289 | 579.1297 (−1.38) | C33H24O10 |
| 18 | 47.7 | Heveaflavone | 579.1286 | 579.1297 (−1.90) | C33H24O10 |
| 19 | 49.6 | 2′′,3′′-Dihydroheveaflavone a | 581.1435 | 581.1453 (−3.10) | C33H26O10 |
| 20 | 54.1 | 7,4′,7′′,4′′′-Tetra-O-methyl-amentoflavone | 593.1446 | 593.1453 (−1.18) | C34H26O10 |
a New compounds from S. doederleinii.