Table 1 Identification of flavonoid compounds in Taxus baccata L. by HPLC–ESI–MS/MS in positive and negative ionization mode

Flavon-3-ol

1

(Epi)catechin-(4,8)-(epi)catechin^a,b

C₃₀H₂₆O₁₂

31.00

578

577

451, 407, 289

2

(Epi)catechin-(4,8)-(epi)gallocatechin^a,b

C₃₀H₂₆O₁₃

33.66

594

593

407, 305, 289

3

(Epi)gallocatechin-(4,8′)-(epi)gallocatechin^a,b

C₃₀H₂₆O₁₄

34.07

610

609

423, 441, 305

4

(Epi)gallocatechin^a,b

C₁₅H₁₄O₇

34.32

306

305

261, 221, 219, 178.97

5

Catechin^a,b

C₁₅H₁₄O₆

35.17

290

289

289, 245, 205, 179

8

Epicatechin^a,b

C₁₅H₁₄O₆

45.92

290

289

289, 245, 205, 179

Flavanonol

9

Taxifolin^b

C₃₀H₂₆O₁₂

46.38

304

305

305, 287, 259

Flavone

10

Apigenin 7-O-glucoside^c

C₂₁H₂₀O₁₀

51.18

432

433

271

11

Apigenin^c

C₂₁H₂₀O₁₀

56.51

270

271

271, 243, 225

Flavanol

12

Myricetin-3-O-rutinoside^a,^b

C₂₇H₃₀O₁₇

62.91

626

627

319

13

Myricetin^a,b

C₁₅H₁₀O₈

63.44

318

319

319, 301, 273

14

Quercetin-3-O-rutinoside^a,b

C₂₁H₂₀O₁₂

66.97

610

611

303

15

Quercetin-7-O-glucoside ^a,b

C₂₇H₃₀O₁₆

69.25

464

465

303

16

Quercetin ^a,b

C₁₅H₁₀O₇

70.90

302

303

303, 285, 257, 165

17

Kaempferol 3-O-rutinoside^a,b

C₂₇H₃₀O₁₅

74.02

594

595

287

18

kaempferol 7-O-glucoside^a,b

C₂₁H₂₀O₁₁

74.39

448

449

287

19

kaempferol^a,b

C₁₅H₁₀O₆

75.57

286

287

287, 269, 240.9

20

Isorhamnetin 3-O-rutinoside^c

C₂₈H₃₂O₁₆

76.04

624

625

317

Biflavonoid

21

Amentoflavone^a,b

C₃₀H₁₈O₁₀

87.78

538

539

539, 403, 421, 377

22

Robustaflavone^c

C₃₀H₁₈O₁₀

88.77

538

539

413, 387, 270

23

Bilobetin^a

C₃₁H₂₀O₁₀

90.39

552

553

553, 435,391, 297

25

Ginkgetin^a

C₃₂H₂₀O₁₀

94.47

566

567

567,449, 417, 405

26

Sciadopitysin^a,b

C₃₃H₂₄O₁₀

99.83

580

581

581, 549, 449, 415

Unidentified compounds

6 

n.d

-

38.59

155

156

155, 113, 109, 95

7 

n.d

-

39.77

155

156

155, 113, 109, 95

24 

n.d

-

93.26

331

332

331, 295, 267, 217