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Table 2 Chemical Composition of the Essential Oils Extracted from Leafs of Eight Eucalyptus Species with content ≥ 1.0%

From: Chemical composition of essential oils of eight Tunisian Eucalyptus species and their antibacterial activity against strains responsible for otitis

Compound class and Name

RIa

Content [%]

       
  

E. accedens

E. bosistoana

E. cladocalyx

E. lesouefii

E. melliodoa

E. robusta

E. punctata

E. wandoo

Monoterpenes hydrocarbons

α-Pinene

932

38.2

10.8

3.9

12.8

9.2

15.1

4.2

6.5

Camphene

952

0.1

0.1

trb

0.1

0.2

1.8

0.3

0.2

β-Pinene

976

-c

0.3

tr

10.9

0.1

0.1

5.4

0.1

α-Phellandrene

1 005

2.2

0.2

tr

0.1

0.2

0.2

0.2

tr

p-Cymene

1 024

8.6

4.0

0.4

7.7

0.4

11.8

28.7

35.8

γ-Terpinene

1 057

0.1

0.1

0.1

0.3

tr

0.3

0.1

3.9

Monoterpene oxides

1.8-Cineole

1 030

28.1

52.7

39.2

38

66.3

26.5

20.7

37.7

Monterpene ketones

Cryptone

1 186

0.1

0.6

0.3

0.8

-

-

8.4

0.2

Verbenone

1 227

0.2

0.5

0.1

0.3

-

0.6

1.5

0.2

Monoterpene aldehydes

Citronellal

1 157

0.1

0.1

0.4

1

0.1

3.5

0.2

tr

Cuminaldehyde

1 239

tr

tr

tr

0.1

tr

0.2

2.1

tr

Phellandral

1 274

-

tr

-

tr

tr

-

1.1

tr

Monterpene alcohols

D-fenchyl alcohol

1 113

0.1

0.1

0.1

0.2

0.4

2.2

0.3

0.2

trans-Pinocarveol

1 138

2.3

3.1

2

3.2

4

5.3

4.2

2.2

endo-Borneol

1 162

0.5

0.9

0.3

0.4

0.7

6.0

1.1

0.4

Borneol

1 171

tr

tr

0.1

1.8

tr

0.4

0.3

tr

Terpinen-4-ol

1 176

0.4

0.2

0.3

3.3

0.3

0.3

0.4

1.1

α-Terpineol

1 191

0.5

0.9

0.2

1.2

1.6

6.7

0.5

1.2

p-Cymen-8-ol

1 196

0.2

0.1

tr

-

0.1

0.4

3.0

0.1

Cuminol

1 290

-

tr

tr

0.1

tr

0.2

1.1

0.1

Sesquitepene hydrocarbons

α-Cubebene

1 346

0.1

-

0.1

-

1.7

-

-

-

Aromadendrene

1 438

0.2

7.3

8.7

0.4

0.6

0.2

0.1

0.1

Alloaromadendrene

1 460

0.1

1.5

1.3

0.4

0.3

0.1

0.1

tr

Ledene

1 492

tr

tr

1.6

tr

-

tr

0.1

tr

Sesquiterpene alcohols

epiglobulol

1 552

tr

0.9

2.3

0.1

0.1

0.3

0.1

tr

Spathulenol

1 577

2.5

4.1

0.2

4.6

0.5

0.2

1.6

-

Globulol

1 584

2.4

2.3

12.7

0.8

1.2

1.4

-

0.1

Viridiflorol

1 591

1

0.7

2.6

0.1

0.2

0.3

0.1

0.2

Rosifoliol

1 612

0.2

0.4

1.7

tr

tr

5.2

0.1

tr

Hinesol

1 642

0.6

0.1

0.1

-

0.1

0.1

-

1.2

β-Eudesmol

1 645

0.7

0.2

0.5

1.1

-

0.1

tr

0.3

Sesquiterpene oxide

Caryophyllene oxide

1 583

-

-

-

-

-

-

1.5

-

Aliphatic esters

        

Methyl amyl acetate

900

tr

tr

8.9

tr

tr

tr

tr

tr

  1. aRI: Retention index determined on HP5 cap. Column. b tr: Trace (< 0.1); c Not detected