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Table 1 Spectral data of the 16 flavonoids identified from Korean S. baicalensis G. using HPLC-MS/MS

From: Proteome profiling of lipopolysaccharide induced L6 rat skeletal muscle cells response to flavonoids from Scutellaria baicalensis Georgi

No

Compound

Rt (min)

[M-H]-/[M + H]+

MS/MS

aQuantity (mg/kg)

1

Pentahydroxyflavanone derivative

20.64

629

303 285 275 217 201 177 149 125

212.543 ± 1.074

2

Pentahydroxyflavanone

23.49

303

303 285 275 259 217 193 177 149 125 109

16.670 ± 0.188

3

Viscidulin I –O– diglucoside

25.98

625

301 283 273 258 229 185 151 125

21.220 ± 0.440

4.

Pentahydroxyflavone

29.31

301

301 283 269 259 240 191 179 161 139 124 121 109

17.657 ± 0.204

5

N.I

34.65

647(+)

647 501 467 347 321 303 285

-

6

Viscidulin III –O– glucoside

35.22

507

345 330 315

-

7

Tetrahydroxyflavone

37.69

285

285 268 241 217 199 177 151 133 107

43.056 ± 0.112

8

Iridin

40.20

521

383 359 344 329 313 300 285 212

21.472 ± 0.415

9

Eriodictyol (4′-hydroxynaringenin)

42.25

289(+)

289 271 247 179 163 153 147

45.679 ± 0.782

10

Puerarin

43.24

415

415 295 267 253 223

7.003 ± 0.022

11

Viscidulin III

43.88

347(+)

347 332 317 314 289 286 183 169 150 142

-

12

Pentahydroxyflavone

45.11

301

301 283 269 241 225 197 179 165 161 139 133 124 107

20.622 ± 0.036

13

N.I

52.55

675

675 529 481 361 335 317 285

-

14

Baicalin

53.67

447(+)

447 343 271 253 225 169 149 123105

3.035 ± 0.013

15

Scutellarein

56.25

285

285 267 257 239 213 195 185 167 165 137 119 117

21.017 ± 0.133

16

Isoscutellarein

57.35

285

285 267 257 241 239 229 213 185 167 165 137 119 117

7.882 ± 0.009

  1. aQuantity data are the mean ± SD of three replicates determinations by HPLC-UV method.
  2. N.I: Not Identified.