Table 3.
Phenolic compounds identified in EtOAc fraction by UV-LC-MS/MS.
| Peak | Retention Time (min) |
[M − H]− (m/z) |
MS/MS Production (Relative Abundance) | Compounds | Amount (mg/g) 1 | References |
|---|---|---|---|---|---|---|
| 1 | 17.68 | 153 | 109(100.0%), 153(39.6%) | Protocatechuic acid | 18.51 ± 0.35 | [63] |
| 2 | 46.75 | 447 | 297(14.7%), 327(100.0%), 357(90.7%) | Orientin | 22.89 ± 1.33 | [64] |
| 3 | 50.16 | 319 | 95(7.0%), 139(41.9%), 153(21.1%), 183(100.0%) | 3,3,4,5,5,7 Hexahydroxyflavanone | 8.51 ± 0.38 | [65] |
| 4 | 52.94 | 223 | 164(53.8%), 208(100.0%), 223(20.6%) | (E)-Sinapic acid | 8.81 ± 1.82 | [63] |
| 5 | 54.51 | 755 | 163(28.3%), 205(29.8%), 309(100.0%), 357(34.4%), 429(53.7%), 489(11.5%) | Unknown | 8.66 ± 0.21 | - |
| 6 | 58.48 | 463 | 257(19.6%), 300(100.0%), 463(3.6%) | Isoquercitrin | 11.58 ± 0.41 | [63] |
| 7 | 59.23 | 447 | 285(100.0%), 447(15.5%) | Luteolin 7-O-glucoside | 16.26 ± 0.40 | [63] |
| 8 | 65.20 | 369 | 145(100.0%), 163(39.5%), 205(15.6%), 309(38.0%), 351(5.3%) | Unknown | 17.01 ± 0.14 | - |
| 9 | 71.39 | 187 | 125(100.0%), 187(51.8%) | Hydroxygallic acid | 7.65 ± 0.79 | [61] |
| 10 | 78.37 | 795 | 256(18.2%), 271(100.0%) | Unknown | 16.09 ± 0.43 | - |
| 11 | 90.46 | 285 | 65(9.4%), 107(19.3%), 133(100.0%), 151(38.7%), 175(20.1%), 199(15.5%), 217(9.1%), 285(49.2%) | Luteolin | 21.79 ± 0.45 | Standard |
| 12 | 96.58 | 747 | 313(24.3%), 328(100.0%) | Unknown | 9.03 ± 0.95 | - |
| 13 | 106.45 | 329 | 299(51.3%), 314(100%), 329(46.9%) | Rhamnazin | 25.63 ± 0.82 | [66] |
| 14 | 111.68 | 585 | 165(79.4%), 195(16.9%), 314(53.1%), 329(100.0%) | Unknown | 21.64 ± 2.91 | - |
1 Amounts of compounds 1 to 14 were presented as milligrams of luteolin equivalents per gram.