Table 1.

GC-MS analysis results of PEO components.

No.	Compounds	RI a	RI b	%
1	Santene	882	884	0.06
2	Tricyclene	918	919	0.11
3	Bicyclo [3.1.0]hexane, 4-methyl-1-(1-methylethyl)-didehydro deriv.	926	—	0.11
4	α-Pinene	934	934	40.91
5	Camphene	944	945	1.08
6	Cosmene	968	—	0.07
7	β-Pinene	973	972	7.04
8	β-Myrcene	992	992	2.04
9	3-Carene	1008	1007	4.12
10	Limonene	1030	1031	24.82
11	Bicyclo [3.1.0]hexane, 6-isopropylidene-1-methyl-	1088	—	0.24
12	L-trans-Pinocarveol	1138	1140	0.58
13	L-camphor	1142	1142	0.35
14	cis-Verbenol	1145	1137	0.24
15	Pinocarvone	1161	1162	0.13
16	Borneol	1166	1160	0.64
17	3-Pinanone	1173	—	0.15
18	4-Terpineol	1178	1177	0.59
19	p-menth-1-en-8-ol	1193	1192	1.41
20	Myrtenol	1197	1195	0.80
21	Verbenone	1209	1205	0.58
22	L-α-bornyl acetate	1285	1287	0.92
23	α-Longipinene	1349	1350	0.55
24	Copaene	1375	1375	0.57
25	D-longifolene	1404	1405	0.59
26	β-Caryophyllen	1419	1420	2.57
27	α-Caryophyllen	1454	1452	0.43
28	γ-Muurolene	1477	1478	0.06
29	Germacrene D	1482	1484	0.11
30	α-Muurolene	1501	1502	0.26
31	α-Himachalene	1510	1500	0.07
32	(+)-δ-Cadinene	1523	1526	0.29
33	Caryophyllene oxide	1583	1585	1.48
34	α-Humulene oxide II	1610	1608	0.12
35	Pentyl cinnamate	1760	—	0.27
36	Cembrene	1941	1944	0.06
37	1-Heptatriacotanol	1956	—	0.02
38	4b,8-Dimethyl-2-isopropylphenanthrene, 4b,5,6,7,8,8a,9,10-octahydro-	1995	—	0.48
39	Manoyl oxide	2009	—	0.17
40	7-Isopropyl-1,1,4a-trimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene	2079	—	0.34
41	1-Phenanthrenecarboxaldehyde, 1,2,3,4,4a,9,10,10a-octahydro-1,4a-dimethyl-7-(1-methylethyl)-, [1R-(1. α, 4a.β,10a.α)]-	2316	—	0.30
	Total			95.73

^a Retention index determined on a DB-5-MS capillary column relative to a series of n-alkanes (C8–C40). ^b Retention index reported from the literature [19,29,30].