Table 1 Peaks assignment using HPLC/PDA/ESI/MSⁿ of metabolites detected in hydroalcoholic extract of OM L. (negative mode)

OM1

Trihydroxyflavanone-O-deoxyhexosyl-O-hexoside

3.07

260, 330

579.15

271, 269, 313, 417

2.6

[45]

OM2

1-Hexanol-pentosylhexoside

6.84

278

395.10

350, 274.8, 230, 202/313

1.8

[46]

OM3

Salvianolic acid C derivative

11.01

320

715.17

491, 311, 179

1.2

[47]

OM4

Dihydroxyphenyllactoyl tartaric acid

17.21

326

329.12

293

1.56

[48]

OM5

Dicaffeoyl hexose

21.50

280

535.11

359,179

1.48

Tentative

OM6

Medioresinol

26.57

325

387.17

207,179

1.92

[49]

OM7

Quercetin-O-rhamnosyl-hexoside ( Rutin)

33.37

350, 254

609.15

1219,480,479,463, 301,179

1.52

[50]

OM8

Rosmarinic acid hexoside

45.74

320

521.13

359, 197, 179, 162

2.02

[47]

OM9

Rosmarinic acid dihexoside

48.93

320

683.16

521, 341, 179

2.3

[51]

OM10

Sagerinic acid

52.94

282, 326 (sh)

719.16

539, 521, 359, 197,179

7.2

[47]

OM11

Rosmarinic acid

53.77

280, 325 (sh)

359.08

197, 179, 161

3.82

[47]

OM12

Lithospermic acid A isomer

55.37

278, 324 (sh)

537.10

493, 359, 313, 295,179

1.72

[47]

OM13

Caffeoyl rosmarinic acid

57.12

282, 326 (sh)

538.11

359, 179

1.42

Tentative

OM14

Rosmarinic acid derivative

58.53

280, 327 (sh)

445.08

359,179

2.7

Tentative

OM15

Salvianolic acid B isomer (lithospermic acid B)

59.28

286, 324 (sh)

717.15

537, 519, 493, 359, 339, 321, 295, 197, 179

6.8

[47]

OM16

Salvianolic acid A

67.72

276, 338 (sh)

493.11

359, 313, 295, 269, 179

0.78

[47]

OM17

Myricetin methyl ether

86.45

254, 362

331.10

315, 300, 179, 151

0.84

[52]