Table 1 Compounds found in different time intervals of colonic fermentation.

Phenolic acid

 Hydroxybenzoic acids

  1

2,3-Dihydroxybenzoic acid

C₇H₆O₄

6.985

[M−H]⁻

154.026

153.0187

153.0187

0.0

109

*12A, 18 A, 18B, 18D, 18E, 48 A, 48B, 48 C, 48D, 48E

  2

Gallic acid

C₇H₆O₅

7.902

[M−H]⁻

170.0223

169.0150

169.0152

1.2

125

*2A, 2B, 2D

  3

Gallic acid 4-O-glucoside

C₁₃H₁₆O₁₀

28.965

[M−H]⁻

332.0758

331.0685

331.0689

1.2

169, 125

48 C

  4

Ellagic acid arabinoside

C₁₉H₁₄O₁₂

40.344

**[M−H]⁻

434.0504

433.0421

433.0416

-3.5

300

*4 C, 4D, 4B

  5

2-Hydroxybenzoic acid

C₇H₆O₃

68.172

**[M−H]⁻

138.0306

137.0233

137.0234

0.7

93

*4D, 0B, 0D, 2B, 2 C, 2E, 4B

 Hydroxycinnamic acids

  6

Feruloyl tartaric acid

C₁₄H₁₄O₉

7.426

[M−H]⁻

326.0658

325.0574

325.0573

-0.3

193, 149

*12A, 12 C ,24 A, 24D

  7

3-Feruloylquinic acid

C₁₇H₂₀O₉

10.143

[M−H]⁻

368.1096

367.1023

367.1029

1.6

298, 288, 192,

191

0 C

  8

Caffeic acid

C₉H₈O₄

11.164

[M−H]⁻

180.0438

179.0365

179.0357

-4.5

143, 133

8E

  9

Caffeoyl tartaric acid

C₁₃H₁₂O₉

11.207

[M−H]⁻

312.0458

311.0385

311.0374

-3.5

161

*2D, 24E

  10

Cinnamic acid

C₉H₈O₂

16.275

**[M−H]⁻

148.0521

147.0448

147.0446

-1.4

103

0D

  11

p-Coumaric acid 4-O-glucoside

C₁₅H₁₈O₈

26.012

**[M−H]⁻

326.0977

325.0904

325.0908

1.2

163

*12A, 12E, 18 A, 18B, 18E, 24E, 2 A, 2B, 2E, 2 C

  12

3-p-Coumaroylquinic acid

C₁₆H₁₈O₈

26.23

**[M−H]⁻

338.1001

337.0928

337.0924

-1.2

265, 173, 162

*12A,12 C,0D,4B

  13

Caffeoyl glucose

C₁₅H₁₈O₉

43.255

[M−H]⁻

342.0955

341.0882

341.0893

3.1

179, 161

4D

  14

Sinapic acid

C₁₁H₁₂O₅

62.051

[M−H]⁻

224.0693

223.0620

223.0617

-1.3

205, 163

*4D

  15

1-Sinapoyl-2-feruloylgentiobiose

C₃₃H₄₀O₁₈

62.859

[M−H]⁻

724.22

723.2127

723.2156

4.0

529, 499

*0 C, 0D ,18 A

Flavonoids

 Flavanols

  16

Myricetin 3-O-galactoside

C₂₁H₂₀O₁₃

7.047

[M−H]⁻

480.0912

479.0839

479.0846

1.5

317

*12A, 12B, 12 C, 12E

  17

(+)-Catechin

C₁₅H₁₄O₆

8.04

**[M−H]⁻

290.0801

289.0728

289.0724

-1.4

245, 205, 179

*0D, 0 A, 0B,0E,4B

  18

(-)-Epigallocatechin

C₁₅H₁₄O₇

15.926

**[M−H]⁻

306.0714

305.0641

305.064

-0.3

261, 219

18D, 4E, 48 C

 Flavones

  19

Apigenin 7-O-apiosyl-glucoside

C₂₆H₂₈O₁₄

11.707

[M+H]⁺

564.1482

565.1555

565.1546

-1.6

296

*8E

  20

7,4’-Dihydroxyflavone

C₁₅H₁₀O₄

55.222

[M+H]⁺

254.0577

255.065

255.0642

-3.1

227, 199, 171

18D

  21

Apigenin 7-O-(6’’-malonyl-apiosyl-glucoside)

C₂₉H₃₀O₁₇

63.291

[M−H]⁻

650.1501

649.1428

649.1439

1.7

605

*24A,48 C

  22

Apigenin 6,8-di-C-glucoside

C₂₇H₃₀O₁₅

63.415

**[M−H]⁻

594.1635

593.1562

593.1547

-2.5

503, 473

*12A,0B,4B

 Flavanones

  23

Naringin 4’-O-glucoside

C₃₃H₄₂O₁₉

63.263

[M−H]⁻

742.2336

741.2263

741.2286

3.1

433, 271

*48A, 4B

 Flavonols

  24

Quercetin 3-O-xylosyl-glucuronide

C₂₆H₂₆O₁₇

11.727

[M+H]⁺

610.1175

611.1248

611.1232

-2.6

479, 303, 285,239

4E

  25

Quercetin 3-O-xylosyl-rutinoside

C₃₂H₃₈O₂₀

62.258

[M+H]⁺

742.1908

743.1981

743.2006

3.4

479, 317

12 C

 Anthocyanins

  26

Cyanidin 3,5-O-diglucoside

C₂₇H₃₁O₁₆

65.061

[M+H]⁺

611.1592

612.1665

612.1647

-2.9

449, 287

*8 C,0E,12B,24B,2 A,48 A

 Isoflavonoids

  27

6’’-O-Malonylglycitin

C₂₅H₂₄O₁₃

11.379

[M+H]⁺

532.1188

533.1261

533.1286

4.7

285, 270, 253

*2A,2B

  28

Equol

C₁₅H₁₄O₃

61.516

[M+H]⁺

242.0939

243.1012

243.1007

-2.1

255, 211, 197

*12B, 12 C,12D,12E,18 A,18 C,24 A,24 C,24D,48B,4E

 Lignans

  29

Pinoresinol

C₂₀H₂₂O₆

10.994

[M−H]⁻

358.1424

357.1351

357.1362

3.1

342, 327, 313,

221

12E, 2D, 4 A

  30

Enterolactone

C₁₈H₁₈O₄

54.521

**[M+H]⁺

298.1203

299.1276

299.1279

1.0

281, 187, 165

*24 C, 2 A, 2B, 2 C, 2E, 4 C, 8B

  31

Arctigenin

C₂₁H₂₄O₆

57.331

**[M−H]⁻

372.1609

371.1536

371.1542

1.6

356, 312, 295

*18 C, 24E, 2B, 2D, 2E, 8B, 8D, 0B, 12 C, 12D, 24 C, 48B, 4 A ,4B, 4E

  32

Secoisolariciresinol

C₃₀H₃₈O₁₀

62.997

**[M−H]⁻

558.2417

557.2344

557.2344

0.0

539, 521, 509, 361

*48E, 4D, 4E