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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
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