Table 2 Mass spectrometric data of compounds in negative ionization mode.

1(a)

12.146

C₁₅H₁₀O₅

270.0493

269

225, 151, 117, 63

Apigenin

2(b)

8.475

C₂₆H₂₈O₁₄

564.1490

563

545, 503, 473, 383, 353, 297, 283

Apigenin-C-hexoside-C-pentoside

3(c)

9.258

C₂₆H₂₈O₁₄

564.1479

563

503, 473, 443, 383, 353

Apigenin-C-hexoside-C-pentoside isomer

4(d)

8.198

C₂₇H₃₀O₁₅

594.1584

593

503, 473, 383, 353

Apigenin-C-hexoside-C-hexoside

5(e)

9.343

C₂₁H₂₀O₁₀

432.1056

431

353, 341, 311, 283, 163, 117

Genistein

6(f)

10.074

C₈H₈O₄

168.0390

167

151, 123, 107, 95, 83, 65

Vanillic acid

7(g)

9.291

C₂₇H₂₆O₁₇

622.1211

621

487, 351, 269, 113

Apigenin-7-O-diglucuronide

8(h)

9.359

C₂₅H₂₆O₁₃

534.1432

533

515, 473, 443, 383, 353, 325, 191

apigenin-6,8-di-C-pentoside

9(i)

8.458

C₁₉H₂₈O₁₂

448.1581

447

401, 293, 269, 161, 101

Apigenin derivative