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Table 1 The tentative structural elucidation of several chemical constituents contained in the E. arvense samples

From: The Saccharomyces cerevisiae transcriptome as a mirror of phytochemical variation in complex extracts of Equisetum arvense from America, China, Europe and India

LC tR (min) λmaxby HPLC PDA (nm) MS peaks (m/z) Tentative ID Reference
5.6 241, 328 312 (100), 179, 149 Caffeoyl tartaric acid isomer [45, 46]
6.5 242, 327 312 (100) Caffeoyl tartaric acid isomer [45, 46]
9.9 241, 327 312 (100), 225, 149 Caffeoyl tartaric acid isomer [45, 46]
11.4 241, 328 311 (100), 179, 148 Caffeoyl tartaric acid isomer [45, 46]
16.2 240, 323 367 (100), 225, 179, 135 Methyl caffeoylquinic acid [45, 46]
18.5 234, 315 336 (100), 295 Caffeoylshikimic acid isomer [47]
19.8 237, 326 335 (100), 295, 179 Caffeoylshikimic acid isomer [47]
24.6 231, 283 650 (100) Quercetin or Protogenkwanin derivative [48]
26.6 241, 342 448 (100), 319 Luteolin glucoside [33, 49]
28.7 265, 354 464 (100), 342, 300 Quercetin glucoside [33, 48]
29.3 255, 366 579 (100), 271 Apigenin 3-O-glucoside-7-O-rhamnoside [33, 50]
30.1 236, 261, 334 489, 463, 431 (100) Apigenin glucoside [33, 49]
31.0 235, 269, 330 462, 410 (100) Quercetin glucoside [33, 48]
31.4 235, 287 610, 301 Quercetin 3-O-glucoside-7-O-rhamnoside [50]
32.9 238, 328 473, 311 (100), 178, 149 Dicaffeoyl tartaric acid [51]
34.9 237, 261, 333 490, 445 (100) Genkwanin glucoside isomer [33, 48]
41.1 288, 353 285 (100) Kaempferol derivative [33, 48]
42.7 233, 270, 324 284 (100) Genkwanin glucoside isomer [33, 48]
46.8 231, 288 302 (100) Quercetin / Protogenkwanin [48]