Table 2.
Flavonoids tentatively identified in Centaurea aegyptiaca
| No | RT | [M-H]-m/z | Fragment ions | [M-H]+ m/z | Fragment ions | Tentatively identified compound | Ref. |
|---|---|---|---|---|---|---|---|
| 1 | 38.23 | 563.14 | 473.26 [M-H-90] 443.31 [M-H-120] 353.22 [M-H-120-90] 383.25 | ------ | Apigenin 8C-hexoside 6C-pentoside | Ibrahim et al.,2015 | |
| 2 | 38.83 | 785.21 | 315.19 [isorh, M-H-2hexose-rh), 623.26 [M-H-162] 477.23 (M-H-162-146] 300.16 | 787.24 | 625.14 [M+H-162] 479.17 [-162-146] 317.13 | Isorhamnetin dihexoside rhamnoside | |
| 3 | 40.46 | 479.08 | 317.15 [M-H-162] 357.15 | 481.10 | 319.08 [M+H-162] | Quercetagenin-O-hexoside | Pajero et al.,2004 |
| 4 | 40.57 | 317.16 | 271.15 287.13 166.03 139.14 299.18 243.14 227.17 179.06 | 319.12 | 273.09 301.03 245.07 181.02 153.08 136.37 | Quercetagenin | |
| 5 | 41.36 | 625.14 | 317.16 [M-H-308] 461.25 341.18 | 627.16 | 481.18 [M+H-146] 319.14 [M+H-146-162] 463.23 [M+H+162] | Quercetagenin-rhamnoside-hexoside (rutinoside) | |
| 6 | 42.22 | 641.27 | 317.15[M-H-2hexose] 243.22 225.30 479.35 [M-H-162] 447.23 | ------ | Quercetagenin dihexoside | ||
| 7 | 44.10 | 639.16 | 477.19 [M-H-162] 315.18 [M-H-162-162] 447.22 300.26 271.21 | 641.17 | 479.17 [M+H-162] 317.16 [M+H-162-162] | Isorhamnetin -O-dihexoside | Lin and Harnly, 2010 |
| 8 | 44.36 | 623.13 | 285.15 [M-H-162-176] 447.22 [M-H-176] 337.23 357.13 257.18 243.26 | 625.14 | 287.12 449.17 [M+H-176] | Kaempferol hexoside glucuronide | |
| 9 | 44.55 | 463.09 | 301.14 | 465.10 | 303.14 | Quercetin-O-hexoside | Vallverdu-Queralt et al., 2015. |
| 10 | 45.46 | 301.18 | 283.13 271.16 255.17 227.10 179.07 8165.10 151.18 | 303.12 | 285.14 273.13 179.14 169.06 137.02 | Quercetin | Vallverdu-Queralt et al.,2015. |
| 11 | 48.01 | 269.14 | 251.16 209.23 225.26 165.27 189.26 | 271.21 | 242.13 253.15 153.10 225.20 211.17 rt48.70 | Apigenin | |
| 12 | 48.31 | 431.10 | 311.22 [M-H-120] 341.25 [M-H-90] | 433.11 | 415.16 367.16 337.14 313.17 | Apigenin C-glucoside (Isovitexin) | Irahim et al.,2015. |
| 13 | 49.05 | 639.16 | 331.20 [M-H-162-146] 316.20 | - | Patuletin hexoside rhamnoside | Parejo et al.,2004 | |
| 14 | 49.08 | 493.10 | 331.16 [M-H-162] | Patuletin hexoside | Parejo et al.,2004 | ||
| 15 | 49.10 | 331.05 331.08 | 316.17 317.18 [M-H-14] | 333.06 | 318.09 301.12 155.05 169.10 | Patuletin | Parejo et al.,2004 |
| 16 | 49.37 | 623.15 | 315.14 300.22 271.18 | 625.18 | 479.17 [M+H-146] 317.07 [M+H-146-162] 463.20 [M+H-162] | Isorhamnetin 3-O-hexoside 7-O-rhamnoside | Stintzing et al., 2004 Ibrahim et al., 2015 |
| 17 | 49.51 | 609.18 | 301.18 [M-H-308] 269.14 199.22 | 611.19 | 449.10 [M+H-162] 271.11 303.13 [M+H-146] 465.10 [quercetin+162] 431.15 413.26 | Quercetin hexoside rhamnoside | |
| 18 | 49.73 | 285.19 | 267.11 253.27 239.12 185.13 137.06 | 287.13 RT59 | 269.22 259.14 241.14 213.12 164.89 153.02 | Kaempferol | Schmeda-Hirschmann Et al., 2015 |
| 19 | 50.52 | 315.05 | 300.20 | 317.07 | 302.11 | Isorhamnetin | Pajero et al., 2004 |
| 20 | 53.79 | 477.10 | 315.18 [M-H-162] 301.19 357.19 [MH-120] 415.35 | 479.12 | 317.13 [M+H-162] 419.94 360.94 | Isorhamnetin 3-O-hexoside | Pajero et al.,2004. |
| 21 | 50.54 | 593.15 | 285.15 [M-H-146-162] 429.28 531.28 269.17 | 595.17 | 287.13 [M+H-162-146] 449.11 [M+H-146] 213.27 | Kaempferol O-hexosiderhamnoside | Ibrahim et al.,2015. |
| 22 | 53.13 | 477.07 | 301.13 [M-H-176] 415.29 | Quercetin glucuronide | |||
| 23 | 54.10 | 431.10 | 269.18 [M-H-162] 311.16 [M-H-120] | 433.11 | 271.10 [M+H-162] 415.21 | Apigenin hexoside | |
| 24 | 54.5 | 461.11 | 299.19 [M-H-162] 339.17 | --- | Hispidulin hexoside | Akkal et al.,2003 | |
| 25 | 55.91 | 593.28 | 269.29 [M-H-162-162] 431.36 [M-H-162] 417.36 285.24 245.27 225.20 | 595.30 | 577.22 [M+H-18] 415.16 [M+H-180] 253.21 235.20 325.14 271.27 | Apigenin -O- dihexoside | |
| 26 | 56.13 | 521.09 | 317.16 [M-H-204] 399.29 429.21 | 523.11 | 319.09 [M+H-204] 503.25 455.14 | Quercetagenin acetyl hexoside | Parejo et al.,2004 |
| 27 | 56.95 | 505.10 | 301.16 [M-H-204] 343.21 [M-H-162] 461.30 [M-H-44] 179.09 151.13 | 507.11 | 303.12 [M+H-204] 385.22 447.23 [M+H-60] | Quercetin acetyl hexoside | Oszmiański et al., 2015 |
| 28 | 57.03 | 491.20 | 476.28 [M-H-15] 315.23 [M-H-176] 329.22 [M-H-162] 431.32 [M-H-60] 175.16 161.12 | Isorhamnetin glucuronide | |||
| 29 | 58.59 | 607.26 | 269.27 [M-H-176-162] 431.37 [M-H-176] 383.21 353.16 | 609.28 | 253.08 235.14 429.03 [M+H-180] 431.28 | Apigenin glucuronide hexoside | |
| 30 | 58.70 | 461.07 | 285.18 219.23 175.11 339.24 | 461.09 | 287.13 [M+H-176] 445.24 [M+H-18] 175.07 | Kaempferol gucuronide | Schmeda-Hirschmann Et al., 2015 |
| 31 | 59.03 | 625.12 | 463.19 [M-H-162] 315.15 301.19 [MH-162-162] | Quercetin 3, 7 di-O-hexoside | Ibrahim et al.,2015. | ||
| 32 | 61.34 | 447.09 | 327.14 [M-H-120] 357.06 [M-H-90] 387.31 [M-H-60] 285.29 429.28 241.25 175.16 | 449.11 | 287.13 431.19 383.12 329.17 276.17 246.19 | Luteolin C-hexoside | Brito et al.,2014 |
| 33 | 61.87 | 491.21 | 285.16 473.36 431.41 [M-H-60] 315.24 [M-H-176] 329.33 [M-H-162] 175.13 179.18 167.19 | 493.23 | 33.13 475.29 [M+H-15] 269 155.05 | Kaempferol methyl ether glucuronic acid | Schmeda-Hirschmann Et al., 2015 |
| 34 | 62.41 | 535.11 | 331.19 [M-H-204] 373.09 [M-H-162] 471.31 [M-H-62] | 537.23 | 478.98 333.18 [M+H-204] 419.88 375.31 [M+H-162] | Patuletin acetyl hexoside | |
| 35 | 63.18 | 519.11 | 315.23 [M-H-204] 357.36 [M-H-162] | 521.13 | 317.12 [M+H-204] 501.27 359.34 [M+H-162] | Isorhamnetin acetyl hexoside | |
| 36 | 63.76 | 639.17 | 519.27 [M-H-120] 549.24 [M-H-90] 607.34 [M-H-32] 463.22 [M-H-176] 301.21 [M-H-176-162] 219.17 | --- | Quercetin C-hexoside glucuronide | ||
| 37 | 64.24 | 521.33 | 359.45 [M-H-162] 503.39 [M-H-18] 489.26 [M-H-32] 475.22 341.44 315.21 | 523.35 | 343.13 [M+H-180] 361.13 [M+H-162] 505.21 [M+H-18] 318.14 325.13 307.23 | Centaurein (jaceidin hexoside) | Flamini et al.,2001 |
| 38 | 68.03 | 299.06 | 284.06 [M-H15-] | 301.07 | 286.09 [M+H129.12 147.11 [15- | Hispidulin | Flamini et al.,2001 |
| 39 | 69.35 | 507.35 | 345.41 [M-H-162] 331.10 299.35 161.19 417.41 | 509.13 | 347.17 [M+H-162] 303.12 449.17 [M+H-60] | Axillarin hexoside | Parejo et al.,2004 |
| 40 | 74.61 | 609.41 | 315.27 [M-H-162-132] 293.34 246.23 225.09 447.39 [M-H-162] | -- | Isorhamnetin hexoside pentoside |