Table 2.

Chemical composition of essential oils obtained from H. perforatum flowers (HEO_Fl) and leaves (HEO_Lv) ^a.

No	RRI	Compound	Fl	Lv	No	RRI	Compound	Fl	Lv
1	965	3-methyl nonane		0.6	48	1687	α-humulene		1.2
2	1032	α-pinene	2.2	4.9	49	1690	cryptone	0.9
3	1035	α-thujene		1.4	50	1693	β-acoradiene		0.4
4	1048	MBOL	1.5		51	1700	limonen-4-ol	3.2
5	1065	2-methyl decane		0.2	52	1704	γ-muurolene		1.4
6	1100	undecane		0.2	53	1706	α-terpineol	6.1
7	1118	β-pinene	0.9	4.6	54	1708	ledene		0.3
8	1132	sabinene		5.6	55	1726	germacrene D		25.7
9	1174	myrcene		2.1	56	1740	α-muurolene		0.8
10	1176	α-phellandrene		t	57	1743	α-cadinene		0.3
11	1188	α-terpinene		0.5	58	1743	eremophilene		1.7
12	1203	limonene		0.5	59	1755	bicyclogermacrene		2.5
13	1218	β-phellandrene		1	60	1758	(E,E)-α-farnesene		0.7
14	1225	(Z)-3-hexenal		0.2	61	1773	δ-cadinene		2.5
15	1246	(Z)-β-ocimene		0.5	62	1776	γ-cadinene		1.0
16	1255	γ-terpinene		1.1	63	1799	cubenene		0.1
17	1266	(E)-β-ocimene		4.2	64	1804	myrtenol	2.7
18	1280	p-cymene	0.5	1.2	65	1815	2,6-dimethyl-3(E),5(Z),7-octatriene-2-ol		0.1
19	1290	terpinolene		0.3	66	1830		1.5
20	1466	α-cubebene		0.1	67	1853	cis-calamenene		0.2
21	1475	acetic acid	1.3		68	1857	geraniol	1.4	t
22	1493	α-ylangene		0.1	69	1864	p-cymen-8-ol	2.9	0.1
23	1495	bicycloelemene		0.1	70	1900	epi-cubebol		t
24	1497	α-copaene		0.2	71	1945	1,5-epoxy-salvial(4)14-ene		t
25	1506	decanal		t	72	1953	palustrol		0.4
26	1525	α-funebrene		t	73	1973	dodecanol		1.2
27	1535	β-bourbonene		0.2	74	2006	MDCB *	9.8
28	1536	italicene		t	75	2008	caryophyllene oxide		1.2
29	1544	α-gurjunene		0.5	76	2050	(E)-nerolidol		0.8
30	1549	β-cubebene		t	77	2057	ledol		1.2
31	1553	linalool	1.3	0.2	78	2069	germacrene D-4β-ol		t
32	1562	octanol	1.1		79	2080	cubenol		0.2
33	1571	TMEOL	0.9	t	80	2088	1-epi-cubenol		0.2
34	1586	pinocarvone	0.9		81	2093	junenol		0.3
35	1587	β-funebrene		1.1	82	2098	globulol		0.3
36	1589	β-ylangene		0.3	83	2099	trans-ascaridol glycol *	4.6
37	1602	MHDO	t		84	2104	viridiflorol		0.2
38	1608	β-pinone	1.3		85	2115	HMCH	3.4
39	1608	β-copaene		0.4	86	2144	spathulenol	1.6	1.9
40	1611	terpinen-4-ol	7.4	2.6	87	2179	tetradecanol		0.7
41	1612	β-caryophyllene	t	9.5	88	2184	cis-p-menth-3-en-1,2-diol	9.1
42	1613	β-cedrene		0.4	89	2187	T-cadinol		0.6
43	1638	CMEOL	1.1		90	2209	T-muurolol		0.8
44	1661	alloaromadendrene		0.6	91	2219	torreyol		0.2
45	1668	(Z)-β-farnesene		0.6	92	2255	α-cadinol	1.5	1.9
46	1670	trans-pinocarveol	0.6		93	2260	alismol		0.1
47	1683	trans-verbenol	1.6		94	2329	trans-sobrerol *	1.7

^a The data are presented as relative % by weight for each component isolated from H. perforatum flowers and leaves. RRI was calculated based on retention of n-alkanes; %, calculated from flame ionization detector data. Trace amounts (t) were present at <0.1%. * Tentatively identified using Wiley and MassFinder mass spectra libraries and published RRI. All other compounds were identified by comparison with co-injected standards. Abbreviations: CMEOL, cis-p-menth-2-en-1-ol; HMCH, 4-hydroxy-4-methyl-cyclohex-2-enone; MBOL, 2-methyl-3-buten-2-ol; MDCB, 3-methoxy-2,3-dimethylcyclobutene; MHDO, 6-methyl-3,5-heptadien-2-one; RRI, relative retention index; TMEOL, trans-p-menth-2-en-1-ol.