Table 1.

Chemical composition of tested essential oils as determined by GC-MS analysis

Number	Componenta	LRIb	Origanum vulgare %	Pinus sylvestris %	Thymus vulgaris %
1	α-Thujene	926	0.34	0.02	0.27
2	α-Pinene	933	0.95	55.76	11.50
3	Camphene	947	0.17	1.79	1.10
4	Sabinene	973	–	0.13	–
5	β-Pinene	979	0.60	9.034	0.77
6	β-Myrcene	992	2.34	3.41	1.30
7	α-Phellandrene	1004	0.17	0.19	0.10
8	δ-3-Carene	1009	–	6.96	1.30
9	α-Terpinene	1017	1.08	0.47	0.49
10	p-Cymene	1025	12.36	2.01	16.26
11	Limonene	1029	0.54	9.74	13.20
12	1,8-Cineole	1033	–	–	1.29
13	trans-Ocimene	1048	–	0.03	0.03
14	γ –Terpinene	1059	7.60	0.10	4.02
15	Terpinolene	1088	–	0.81	0.40
16	cis-Sabinene hydrate	1098	–	0.06	0.13
17	trans-Pinocarveol	1140	–	0.12	–
18	Camphor	1144	–	0.07	1.37
19	Borneol	1166	–	0.12	0.69
20	Terpinen-4-ol	1179	0.86	0.21	0.63
21	p-Cymen-8-ol	1186	–	0.25	0.04
22	α-Terpineol	1192	–	0.87	1.22
23	Verbenone	1210	–	0.07	–
24	Bornyl-acetate	1289	–	0.95	–
25	Thymol	1295	5.12	–	26.52
26	Carvacrol	1305	62.61	–	7.85
27	α-Cububene	1355	–	0.11	–
28	α-Copaene	1381	–	0.14	–
29	β-Caryophyllene	1425	0.89	0.94	1.34
30	α-Humulene	1460	–	0.11	–
31	γ –Muurolene	1481	–	0.06	–
32	Caryophyllene oxide	1593	1.01	–	–

^aCompounds are listed in order of elution

^bLinear retention index (LRI) calculated on HP-5 column