Table 1.

Chemical constituents of REO.

N.	Constituents	Retention Index (RI)	Relative Percentage (%)
1	Tricyclene	928	0.4
2	α-Thujene	933	0.05
3	α-Pinene	941	24.62
4	Camphene	955	8.1
5	Verbenene	971	1.22
6	Sabinene	980	0.12
7	β-Pinene	982	1.09
8	Octen 3-ol	983	0.1
9	3-Octanone	987	1.3
10	Myrcene	992	4.1
11	3-Octanol	994	0.1
12	6-Methyl-5-Hepten-2-ol	996	0.1
13	α-Phellandrene	1005	0.1
14	δ-2-Carene	1006	0.1
15	α-Terpinene	1021	1
16	para-Cymene	1031	1
17	Limonene	1034	6.1
18	1,8-Cineole	1039	14.1
19	Z-β-Ocimen	1044	0.06
20	Benzene acetaldehyde	1049	0.1
21	γ-Terpinene	1066	1.1
22	Cis-Sabinene hydrate	1081	0.06
23	Terpinolene	1095	1.1
24	Linalool	1107	2.13
25	Phenyl ethyl alcohol	1111	0.022
26	endo-Fenchol	1125	0.05
27	Chrysanthenone	1139	0.6
28	Camphor	1157	13.53
29	Camphene hydrate	1159	0.07
30	Trans-Pinocamphone	1171	0.45
31	Pinocarvone	1174	0.17
32	Borneol	1177	2.13
33	n-Nonanol	1178	0.56
34	Terpine-4-ol	1190	0.62
35	α-Terpineol	1194	1.09
36	Myrtenol	1207	0.3
37	Verbenone	1220	5.21
38	Citronellol	1233	0.1
39	Carvone	1248	0.1
40	Geraniol	1259	0.3
41	Bornyl acetate	1298	3.4
42	para-Cymene-7-ol	1299	0.1
43	Trans-Sabinyl acetate	1302	0.04
44	Tridecane	1305	0.09
45	Neryl acetate	1373	0.1
46	Geranyl acetate	1388	0.1
47	β-Caryophyllene	1428	1.8
48	Geranyl acetone	1462	0.1
49	α-Humulene	1464	0.27
50	Caryophyllene oxide	1590	0.11
51	Eicosane	2007	0.3
	Total identified		99.96