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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]