Table 1.
Identification of the major compounds detected of X. strumarium by LC-ESI-MS.
| Peaks | Rt (min) | UV/Vis λMax (nm) | LC-ESI-MS | Compounds | |
|---|---|---|---|---|---|
| Mass [M]+ (m/z) | Fragment [M + H]+ (m/z) | ||||
| 1 | 7.20 | 294, 258, 227 | 154.12 | 137.58 | Protocatechuic acid |
| 2 | 10.28 | 290, 254, 229 | 166.17 | 108.14 | 3-Hydroxy-1-(4-hydroxy phenyl)propan-1-one |
| 3 | 10.94 | 266, 219 | 243.22 | 111.10 | Cytidine |
| 4 | 12.18 | 328, 243 | 368.34 | 180.16 | Neochlorogenic acid methyl ester |
| 5 | 14.86 | 327, 242, 224 | 353.99 | 209.22 | Chlorogenic acid |
| 6 | 17.55 | 330, 244 | 530.48 | 368.34 | Methyl-3,5-di-O-caffeoylquinic acid |
| 7 | 17.90 | 346, 242 | 401.67 | 239.29 | Thiazine-3,5-dione-11-O-glucopyranoside |
| 8 | 19.34 | 352, 257, 223 | 508.71 | 332.26 | Patuletin-3-glucuronide |
| 9 | 20.13 | 354, 256, 202 | 478.36 | 302.24 | Quercetin-3-O-glucuronide |
| 10 | 20.59 | 328, 243, 223 | 516.17 | 354.20 | 3,5-Di-O-caffeoylquinic acid |
| 11 | 21.51 | 330, 244, 223 | 516.17 | 354.20 | 1,5-Di-O-caffeoylquinic acid |
| 12 | 24.18 | 328, 245, 223 | 516.17 | 354.20 | 1,3-Di-O-caffeoylquinic acid |
| 13 | 24.78 | 327, 244, 224 | 678.27 | 516.45 | 1,3,5-Tri-O-caffeoylquinic acid |