Table 1  The 11 analysed EOs with their common name, scientific name, plant species, used plant part, origin of plants, extraction method, and chemical composition according to manufacturer or literature.

EO common name	Scientific name	Plant species	Plant part	Origin of used plants	Extraction method	Chemical composition given by the [A] manufacturer/[B] literature
Cinnamon cassia	Cinnamomi cassiae aetheroleum	Cinnamomum cassia (L.) J.Presl	leaves and young branches	China	steam distillation	[ A ] cinnamaldehyde 77.9%, trans -2-methoxycinnamaldehyde 9.1%, cinnamyl acetate 3.4%, coumarin 2.1%, eugenol 0.1%
Clove	Caryophylli aetheroleum	Syzygium aromaticum (L.) Merr. et L. M. Perry	leaves	Indonesia	steam distillation	[ B ] eugenol (60 – 95%) 39 ; (75 – 88%) 40 , α - and β -caryophyllene (5 – 10%) 39 ; (75 – 88%) 40 , acetyleugenol (2 – 27%) 39 , (4 – 15%) 40 , < 1%: 2-heptanone, ethyl hexanoate, humulenol; sesquiterpenes, α -humulene, α -humulene epoxide, β -humulene, β -caryophyllene oxide, α -cubebene, α -copaene, α -cadinene, δ -cadinene, α -ylangene, calacorene, calamenene 40
Coriander	Coriandri aetheroleum	Coriandrum sativum L.	fruits	Russia	steam distillation	[ A ] linalool 71.04%, α -pinene 6.12%, γ -terpinene 4.91%, camphor 4.53%, geranyl acetate 3.74%, limonene 2.59%, geraniol 1.78%, p -cymene 0.65%, α -terpineole 0.28%
Eucalyptus	Eucalypti aetheroleum	Eucalyptus globulus Labill.	leaves and branches	China	steam distillation	[ B ] 1,8-cineole (54 – 95%), α -pinene (2.6%), p -cymene (2.7%) 39
Lemongrass	Cymbopogoni aetheroleum	Cymbopogon flexuosus Nees ex Wats.	aerial parts	India	steam distillation	[ B ] citral (75%), geraniol (5.6%) 41
Peppermint	Menthae piperitae aetheroleum	Mentha x piperita L.	aerial parts	India	steam distillation	[ A ] menthol 40.32%, menthone 25.22%, menthyl acetate 5.33%, cineole 4.6%, isomenthone 4.16%, menthofuran 2.79%, limonene 2.14%, pulegone 1.00%, isopulegol 0.19%, carvone 0.07%
Spruce	Piceae aetheroleum	Abies sibirica Ledeb.; Abies alba Mill.	needles and branches	Russia	steam distillation	[ B ] Abies sibirica : bornylacetate (30 – 40%), camphene (ca. 10%), santene, α - and β -pinene, α -phellandrene, limonene; Abies alba : bornylacetate (37 – 49%), camphene (10 – 17%), α - and β -pinene 38
Star anise	Anisi stellati aetheroleum	Illicium verum Hook. fil.	fruits	China	steam distillation	[ B ] trans- anethole (80 – 90%), methylchavicol, foeniculin, cis -anethol, anisaldehyde, limonene, linalool, α -pinene 38
Thyme	Thymus zygis aetheroleum	Thymus zygis L.	aerial parts	Spain	steam distillation	[ A ] thymol 46.69%, γ -terpinene 9.65%, p -cymol 19.56%, linalool 4.51%, carvacrol 3.04%, myrcene 1.87%, α -terpinene 1.72%, α -thujene 1.39%, terpinene-4-ol 1.01%, carvacrol methyl ether 0.34%
Wintergreen	Gaultheriae aetheroleum	Gaultheria procumbens L.	leaves	China	steam distillation	[ A ] methyl salicylate 98.90%
Winter savory	Saturejae montanae aetheroleum	Satureja montana L.	aerial parts	Southern Europe	steam distillation	[ B ] carvacrol (30 – 60%), p- cymene (10 – 20%), γ -terpinene (5 – 15%), borneole, carvone, β -caryophyllene 38