Table 1.

Compounds detected in O. vulgare essential oil

N°	Compound	% area	RIa	Identification
Monoterpenes hydrocarbons (26.59%)
1	α-thujene	0.65	944.2	MS, RIb
2	α-pinene	0.16	953.9	MS, RIb
3	sabinene	2.84	991.2	MS, RIb
4	β-myrcene	1.07	1005.9	MS, RIb, Co-I
5	α-phellandrene	0.48	1024.6	MS, RIb
6	α-terpinolene	5.02	1037.5	MS, RIc
7	p-Cymene	2.20	1045.8	MS, RIb
8	3-carene	0.41	1055.8	MS, RIb
9	γ-terpinene	11.66	1080.3	MS, RIb
10	α-terpinolene	1.87	1110.4	MS, RIb, Co-I
11	trans-allo-ocimene	0.23	1150.5	MS, RIb
Oxygenated Monoterpenes (64.13%)
12	4-thujanol	3.01	1089.2	MS, RIb,
13	linalool	0.55	1119.6	MS, RIb
14	cis-sabinene hydrate	16.72	1124.0	MS, RIb
15	cis-β-terpineol	0.02	1128.7	MS, RIb, Co-I
16	cis-2-menthenol	1.21	1147.6	MS, RIb
17	trans-2-menthenol	0.78	1165.7	MS, RIb
18	pinocarvone	0.02	1192.0	MS, RIb
19	endo-borneol	0.28	1194.8	MS, RIb
20	4-terpineol	13.57	1205.5	MS, RIb, Co-I
21	α-terpineol	3.13	1218.3	MS, RIb, Co-I
22	trans-piperitol	0.30	1224.1	MS, RIb
23	cis-piperitol	0.38	1236.0	MS, RIb
24	methyl carvacrol	3.17	1269.9	MS, RIb
25	linalyl acetate	3.99	1277.1	MS, RIb
26	thymol	14.20	1314.5	MS, RIb
27	carvacrol	2.64	1324.0	MS, RIb
28	geranyl acetate	0.16	1406.2	MS, RIb
Sesquiterpenes (5.12%)
29	caryophyllene	3.56	1465.2	MS, RIb
30	α-humulene	0.32	1499.2	MS, RIb
31	bicyclogermacrene	1.24	1544.6	MS, RIb
Oxygenated Sesquiterpenes (0.47%)
32	neryl acetate	0.08	1387.5	MS, RIb
33	spathulenol	0.27	1631.7	MS, RIb
34	caryophyllene oxide	0.12	1640.5	MS, RIb
Others (2.55%)
35	Cyclohexane, 1-methylene-4-(1-methylethenyl)-	1.74	1051.9	MS, RIb
36	benzene, 2-methoxy-4-methyl-1-(1-methylethyl)-	0.81	1259.9	MS, RIb
	Percentage of identified molecules	98.86

^a: Experimental retention index for non-polar column; ^b: bibliographic retention index for non-polar column, MS Mass spectra, Co-I Co-injection of standard