Table 2.
Precursor and product ions of constituents in Polygonum cuspidatum Sieb.et Zucc.
| No. | Compound name | t R/min | Molecular formula | [M-H]− | [M+H]+ | MS/MS m/z |
|---|---|---|---|---|---|---|
| 1 | Ellagic acid | 3.61 | C14H6O8 | 300.9995 | 257.0193, 228.0068, 185.0241 | |
| 2 | Polydatin | 4.01 | C20H22O8 | 389.1243 | 227.0859, 143.0497 | |
| 3 | Epicatechin gallate | 4.21 | C22H18O10 | 441.0836 | ||
| 4 | Resveratrol | 10.81 | C14H12O3 | 227.0712 | 142.9914, 185.0603 | |
| 5 | Cynaroside | 11.27 | C21H20O11 | 447.0942 | 285.0428, 256.0375, 212.0472, 108.3744 | |
| 6 | Glycitein | 12.56 | C16H12O5 | 285.0758 | 270.0519, 242.0573, 183.0803 | |
| 7 | Isokaempferide | 15.45 | C16H12O6 | 301.0709 | 283.0602, 255.0653, 226.0621, 128.0622 | |
| 8 | Luteolin | 17.71 | C15H10O6 | 285.0454 | 257.0454, 242.0223, 213.0557, 109.8052 | |
| 9 | Genistein | 19.15 | C15H10O5 | 269.0458 | 241.0504, 225.0556 | |
| 10 | Formonontin | 19.50 | C22H22O9 | 267.0294 | 225.4558, 197.1059 | |
| 11 | Emodin | 26.20 | C15H10O5 | 271.0603 | 225.0544, 183.0809 | |
| 12 | Marmesin | 26.69 | C14H14O4 | 247.0968 | 229.0859 |