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. 2023 May 30;13(6):1288. doi: 10.3390/life13061288

Table 4.

Tentatively identified phenolic compounds in Centranthus longiflorus IR stem extract.

No. Rt UV (min) λmax (nm) Rt MS (min) [M-H]− (m/z) MS2 Fragments a Tentative Annotation b
1 3.93 322 4.02 353 191, 179, 135 1-O-caffeyolquinic acid
2 5.12 326 5.21 353 191, 179, 135 3-O-caffeyolquinic acid
3 5.43 326 5.52 353 191, 179, 135 4-O-caffeyolquinic acid
4 5.68 322 5.77 179 135 Caffeic acid
5 5.98 346 6.09 755 593, 285, 447 Luteolin glycoside
6 6.28 318 6.37 337 191, 163 p-Coumaroylquinic acid
7 6.88 326 6.97 367 191, 173, 193 5-Feruloylquinic acid
8 7.26 354 7.37 741 300, 609, 591 Quercetin triglycoside
9 7.81 330 7.90 359 197, 153, 135 ?
10 7.87 354 7.97 609 301, 343, 271 Quercetin rutinoside
11 8.18 354 8.26 463 301, 343, 179 Quercetin glucoside
12 8.67 346 8.74 507 461, 179, 377 ?
13 8.67 346 8.75 593 285, 327, 257 Luteolin glycoside
14 8.84 330 8.94 623 315, 300, 577 Isorhamnetin glycoside
15 9.02 330 9.10 447 284, 285, 327, 255 Luteolin glucoside
16 9.02 n.d. 9.11 515 353, 447, 191 Dicaffeoyl quinic acid
17 9.02 n.d. 9.12 505 459, 265, 193 ?
18 9.57 326 9.66 515 353, 299, 202 Dicaffeoyl quinic acid
19 9.57 n.d. 9.68 359 193, 295, 211 ?
20 10.06 334 10.17 693 651, 301, 609 Quercetin diacetyl diglycoside
21 10.38 334 10.47 693 651, 301, 609 Quercetin diacetyl diglycoside
22 11.02 330 11.14 359 179, 161, 135, 315 Rosmarinic acid isomer
23 11.02 n.d. 11.14 677 635, 285 Luteolin diacetyl diglycoside
24 11.10 330 11.12 359 179, 161, 135, 315 Rosmarinic acid isomer
25 11.10 n.d. 11.12 677 635, 285 Luteolin diacetyl diglycoside
26 11.53 334 11.62 637 591, 283 Acacetin glycoside
27 12.13 354 12.23 735 693, 651, 301, 463 Quercetin triacetyl diglycoside
28 12.45 346 12.55 851 809, 719, 579, 284 Luteolin triacetyl triglycoside
29 13.01 350 13.09 719 677, 285, 635 Luteolin triacetyl diglycoside
30 13.24 334 13.34 285 285, 151, 257 Luteolin

a: fragments in decreasing intensity order; b: based on fragmentation, retention time, λmax compared to literature [38,39,40], n.d.: λ-max could not be determined, ?: compound could not be identified based on MS fragmentation pattern, retention time and λ-max.