Table 3.
Identified extracts’ chemical constituents of brown seaweed with molecular/adduct ions and their proper fragment ions obtained after the effect of 35 eV collision energy. Numbers in parentheses (C:N) indicate the number of carbon atoms (C) and double bonds (N) in the fatty acid side chains. tr is the retention time.
| No. | [M − H]− or [M + HCOOH]− m/z |
tR, min | MS/MS Fragment Ions, m/z | Compound | The Literature |
|---|---|---|---|---|---|
| 1. | 180.90 | 0.86 | 163, 143, 131, 119, 101 (100%), 89, 83, 59 | d-(−)-mannitol * | |
| 2. | 236.93 | 6.89 | 193 (100%) | 7-hydroxyflavone * | |
| 3. | 260.95 | 7.20 | 189, 165 (100%) | 4-hydroxybenzoic acid-4-O-glucoside | Chen et al. [28] |
| 4. | 265.12 | 14.94 | 97 (100%) | oxidized fatty acid * | |
| 5. | 272.92 [M − H + HCOOH]− | 0.65 | 227, 217, 159 (100%), 115 | resveratrol | de Oliveira et al. [29] |
| 6. | 277.01 | 1.56 | 185 (100%), 141, 97 | octadecatrienoic acid | Fahmy et al. [30] |
| 7. | 293.04 | 13.59 | 249, 236 (100%), 221, 217, 193, 136 | hydroxy-octadecatrienoic acid | Fahmy et al. [30] |
| 8. | 304.87 | 19.00 | 175 (100%), 131 | 2-isopropylmalic acid derivative | Sobeh et al. [31] |
| 9. | 305.04 | 11.00 | 249, 231 (100%) | unknown | |
| 10. | 311.22 | 15.48 | 243, 211, 183, 149 (100%) | caftaric acid | Ramabulana et al. [32] |
| 11. | 317.03 | 15.11 | 299, 255, 249 (100%), 228, 215, 181, 163, 135 | p-coumaric acid derivative * | |
| 12. | 319.18 | 15.61 | 301 (100%), 275, 257, 203, 179, 167, 115 | 5-O-p-coumaroylshikimic acid | Ben Said et al. [33] |
| 13. | 351.03 | 14.14 | 315 (100%), 297, 222, 161, 111 | isorhamnetin derivative | Ben Said et al. [33] |
| 14. | 353.21 | 14.20 | 335, 317, 310, 256, 191 (100%), 173, 123 | 1-caffeoylquinic acid | Zhu et al. [34] |
| 15. | 355.30 | 16.54 | 337, 309 (100%), 205, 130 | coumaroylglucaric acid isomer | Chandradevan et al. [35] |
| 16. | 360.93 | 6.02 | 317 (100%), 293, 273, 231, 185 | phlorotannin derivative | Chen et al. [36] |
| 17. | 372.83 | 18.91 | 305 (100%) | fucophlorethol | Chen et al. [36] |
| 18. | 378.69 | 18.89 | 311 (100%), 249, 179 | caftaric acid derivative | Ramabulana et al. [32] |
| 19. | 379.12 | 0.70 | 343 (100%), 179 | quercetin derivative | Ben Said et al. [33] |
| 20. | 384.77 | 17.84 | 317, 249 (100%) | phlorotannin derivative | Chen et al. [36] |
| 21. | 385.20 | 16.29 | 317, 249, 227 (100%), 195, 175, 157 | phlorotannin derivative | Chen et al. [36] |
| 22. | 439.29 | 17.52 | 281 (100%), 227 | sterol (C:N 25:0;O6) | Fahmy et al. [30] |
| 23. | 440.87 | 18.94 | 425, 373, 305 (100%), 175 | epigallocatechin derivative | Chandradevan et al. [35] |
| 24. | 452.73 | 17.66 | 385, 317 (100%), 249 | phlorotannin derivative | Fahmy et al. [30] |
| 25. | 484.95 | 6.38 | 441, 397, 349, 315, 301 (100%), 297, 271, 257, 225 | quercetin derivative * | |
| 26. | 501.12 | 14.84 | 484, 458, 433, 380 (100%), 365, 285, 272, 212, 197 | kaempferol derivative | Chandradevan et al. [35] |
| 27. | 508.70 | 18.70 | 441 (100%), 373, 312, 305 | epigallocatechin derivative | Chandradevan et al. [35] |
| 28. | 520.65 | 17.69 | 452, 387 (100%), 317 | kaempferol-3-O-glucoside | Chandradevan et al. [35] |
| 29. | 527.09 | 7.15 | 499, 481, 409, 401 (100%), 387, 367, 341, 329, 313, 282, 271 | unknown | |
| 30. | 527.30 | 15.21 | 334, 299, 244, 225 (100%), 207, 165, 153 | orientin-sulphate | Ben Said et al. [33] |
| 31. | 547.40 | 17.07 | 479, 379, 285 (100%), 279, 267 | luteolin derivative | Chandradevan et al. [35] |
| 32. | 549.45 | 18.16 | 482, 405, 287, 279 (100%), 269 | liquiritigenin-hexose-xyl/ara | Wang et al. [37] |
| 33. | 555.32 | 16.27 | 508, 299 (100%), 225 | sulfoquinovosyl monoacylglycerol (C:N 16:0) | Fahmy et al. [30] |
| 34. | 557.14 | 15.46 | 525, 511 (100%), 421, 308, 287, 275, 253, 231, 161 | caffeic acid derivative | Chandradevan et al. [35] |
| 35. | 559.15 | 15.75 | 513 (100%), 491, 423, 289, 277, 253 | caffeic acid derivative | Chandradevan et al. [35] |
| 36. | 571.31 | 17.40 | 521, 449, 311, 293 (100%), 277, 231 | caffeic acid derivative | Chandradevan et al. [35] |
| 37. | 579.25 | 15.90 | 307, 225 (100%) | sulfoquinovosyl monoacylglycerol (C:N 18:2) | Cerulli et al. [38] |
| 38. | 581.30 | 16.32 | 535, 377, 308, 299 (100%), 282, 225, 208 | 3-O-methylorobol derivative | Ben Said et al. [33] |
| 39. | 588.70 | 17.64 | 521 (100%), 453, 317 | unknown | |
| 40. | 599.06 | 10.29 | 555, 534, 507, 473 (100%), 459, 439, 411, 399, 383, 355, 343, 312, 275, 254 | unknown | |
| 41. | 609.02 | 6.60 | 565 (100%), 439, 395, 301, 297 | Rutin | Gašić et al. [39] |
| 42. | 665.46 | 17.88 | 634, 619, 605, 561, 545, 510, 445, 354 (100%), 337, 310, 293, 282, 266, 251, 239, 228 | posphatidic acid (C:N 34:4) | Melo et al. [40] |
| 43. | 719.09 | 15.18 | 673, 583, 447 (100%), 397, 243 | posphatidylglycerol (C:N 32:1) | Melo et al. [40] |
| 44. | 721.15 [M + HCOO]− | 15.50 | 675 (100%), 653, 397 | digalactosyl monoacylglycerol (C:N 18:3) | Fahmy et al. [30] |
| 45. | 723.10 | 15.92 | 677, 452 | phlorotannin sulfate | Chouh et al. [41] |
| 46. | 725.14 | 16.52 | 689, 679, 589, 453, 429 (100%), 397, 379 | unknown | |
| 47. | 774.00 | 17.02 | 737 (100%), 688, 455, 443 | unknown | |
| 48. | 805.43 | 16.94 | 761, 391 (100%), 347, 305 | unknown |
* https://massbank.eu (accessed on 9 May 2024).