Table 1 Phytochemical components of the EO (%), retention time (RT), and retention index (RI) extracted from O. punonense characterized by GC-MS apparatus

Tricyclene

9.31

920

720,260

0.04

α-Thujene

9.49

924

5,044,381

0.31

ND

9.72

929

3,025,890

0.18

α-Pinene

9.84

932

80,753,656

4.90

α-Fenchene

10.52

947

29,269,830

1.77

Camphene

10.7

951

632,678

0.04

β-Pinene

11.76

974

11,230,685

0.68

Oct-1-en-3-ol

12

980

2,462,992

0.15

3-octanone

12.17

983

1,188,587

0.07

Myrcene

12.36

988

13,079,083

0.79

Octan-3-ol

12.77

997

568,156

0.03

m-Mentha-1(7),8-diene

12.94

1000

498,601

0.03

δ-2-Carene

13.04

1003

6,230,455

0.38

δ-3-Carene

13.16

1006

240,792

0.01

α-Terpinene

13.52

1014

14,512,632

0.88

p-Cymene

13.89

1023

109,886,056

6.66

Limonene

14.08

1027

30,302,694

1.84

1,8-Cineole

14.19

1030

46,887,008

2.84

δ-Terpinene

15.34

1057

48,862,740

2.96

Terpinolene

16.45

1083

1,052,534

0.06

ρ-Cymenene

16.62

1087

198,446

0.01

Linalool

17.1

1098

26,705,358

1.62

Camphor

18.89

1144

22,466,356

1.36

Menthone

19.26

1154

409,562

0.02

Terpinen-4-ol

20.24

1179

7,776,528

0.47

Dihydro carveol

20.83

1194

17,909,766

1.09

trans-Dihydro carvone

21.12

1201

1,242,625

0.08

(Z)-Ocimenone

21.79

1220

788,686

0.05

Thymol, methyl ether

22.41

1237

2,390,820

0.14

trans-ocimenone

22.6

1243

45,595,056

2.76

Carvone

22.71

1246

88,185,480

5.35

Thymol

24.4

1293

24,081,318

1.46

Carvacrol

24.9

1307

946,798,784

57.40

Isodihydrocarveol acetate

25.5

1325

3,994,459

0.24

Eugenol

26.38

1352

1,002,688

0.06

α-Ylangene

27.16

1375

217,940

0.01

β-Bourbonene

27.43

1383

1,357,813

0.08

b-Elemene

27.6

1388

386,477

0.02

Methyl eugenol

27.91

1397

74,425

0.00

ND

28.1

1403

144,044

0.01

β-caryophyllene

28.61

1420

40,231,916

2.44

α-caryopyllene

29.71

1455

7,255,391

0.44

(E,E)-α-Farnesene

31.3

1506

458,884

0.03

Caryophyllene oxide

33.56

1583

2,978,091

0.18

ND

34.37

1610

315,107

0.02

SUM

164,941,570

100.00

Yields

0.71

Phytochemical groups

Monoterpene hydrocarbons

21.37

Oxygenated monoterpenes

74.95

Sesquiterpene hydrocarbons

3.03

Oxygenated sesquiterpene

0.18

Others

0.26

ND

0.21

Total

100.00