Table 4. Comparative chemical profile (%) of four Pinaceae essential oils

RT (min)	Compound	KI	% in chemical components
			Picea koraiensis	Abies nephrolepis	Picea abies	Tsuga sieboldii
15.46	Santene	877.14	1.4	3.94	2.39	-
19.05	Tricyclene	915.53	0.84	1.9	1.67	3.46
20.18	α-Pinene	923.69	13.27	19.76	13.04	18.97
22.18	Camphene	938.14	14.13	18.91	20.56	11.02
25.97	β-Pinene	965.51	2.88	1.74	2.17	2.28
27.81	Myrcene	978.8	2.56	-	1.24	8.83
31.28	β-Carene	1,003.86	1.06	0.51	1.92	0.05
35.68	Limonene	1,035.64	16.76	20.24	10.59	9.03
35.95	β-Phellandrene	1,037.59	1.04	-	-	4.21
36.18	Eucalyptol	1,039.26	-	-	0.68	-
43.44	Terpinolene	1,091.69	-	-	0.61	0.33
44.84	Linalool	1,103.94	-	0.66	-	-
47.95	Camphor	1,152.91	12.75	-	3.35	0.09
48.44	Camphene hydrate	1,160.63	1.9	-	-	-
49.59	Borneol	1,178.74	5.05	5.4	8.33	0.5
51.07	α-Terpineol	1,201.69	0.83	0.76	0.75	1.21
52.41	Fenchyl acetate	1,219.12	-	1.27	-	-
57.78	Bornyl acetate	1,288.95	13.88	13.78	18.65	25
62.12	α-Terpinyl acetate	1,359.15	-	0.62	-	-
65.04	α-Gurjunene	1,412.69	-	0.93	-	-
65.71	Methyl undecanoate	1,429.35	1.9	1.64	1.83	1.61
65.83	Caryophyllene	1,432.34	-	0.81	-	1.2
69.55	β-Cadinene	1,531.75	0.58	-	0.73	0.23
70.77	Nerolidol	1,570.48	-	0.92	-	-
73.8	α-Cadinol	1,678.95	1.1	-	0.94	0.25
74.48	α-Bisabolol	1,704.96	-	1.48	-	0.08
Total chemical constituents (%)			91.33	95.27	89.45	88.35

RT: retention time, KI: Kovats index, -: below detection limit.