Table 6.

Chemical composition of Pycnanthemum incanum aerial parts essential oil.

RIcalc	RIdb	Compound	%	ED, (+):(−)	[20]
933	933	α-Pinene	tr		29:71
972	971	Sabinene	0.5	0:100
978	978	β-Pinene	0.1	0:100
979	978	1-Octen-3-ol	3.1	0:100	0:100
989	989	Myrcene	0.3
1018	1017	α-Terpinene	0.1	100:0
1025	1024	p-Cymene	0.8
1030	1030	Limonene	1.2	0:100
1032	1030	1,8-Cineole	30.7
1036	1034	(Z)-β-Ocimene	0.1
1046	1046	(E)-β-Ocimene	0.2
1058	1058	γ-Terpinene	0.6
1070	1069	cis-Sabinene hydrate	5.6	7.2:92.8
1086	1086	Terpinolene	0.2
1100	1099	Linalool	0.3		95:5
1101	1099	trans-Sabinene hydrate	3.0	36.5:63.5
1125	1124	cis-p-Menth-2-en-1-ol	0.2
1142	1139	trans-p-Menth-2-en-1-ol	0.1
1156	1156	Menthone	0.2		0:100
1164	1165	Isomenthone	1.0	100:0	100:0
1170	1170	δ-Terpineol	2.6
1171	1170	Borneol	8.2	0:100
1180	1180	Terpinen-4-ol	1.8	33.1:66.9
1195	1195	α-Terpineol	16.9	29.2:70.8	15:85
1237	1237	Pulegone	1.8	100:0	100:0
1283	1282	Bornyl acetate	0.2	0:100
1289	1289	Thymol	0.3
1331	1331	Bicycloelemene	0.1
1335	1335	δ-Elemene	0.6	0:100
1375	1375	α-Copaene	0.2	100:0
1383	1382	β-Bourbonene	0.2
1389	1390	trans-β-Elemene	0.3	47.0:53.0
1418	1417	(E)-β-Caryophyllene	11.0	100:0
1429	1430	β-Copaene	0.1
1454	1453	α-Humulene	0.5
1479	1480	Germacrene D	5.0	90.9:9.1
1494	1497	Bicyclogermacrene	0.3
1503	1504	(E,E)-α-Farnesene	0.2
1517	1520	δ-Cadinene	0.3	0:100
1557	1557	Germacrene B	0.1
1559	1561	(E)-Nerolidol	0.1	0:100
1575	1576	Germacrene D-4-ol	0.1
1580	1577	Caryophyllene oxide	0.3
1637	1639	cis-Guaia-3,9-dien-11-ol	0.3
		Monoterpene hydrocarbons	4.3
		Oxygenated monoterpenoids	72.9
		Sesquiterpene hydrocarbons	18.8
		Oxygenated sesquiterpenoids	0.9
		Others	3.1
		Total identified	100.0

RI_calc = retention indices calculated with respect to a homologous series of n-alkanes on a ZB-5 column. RI_db = retention indices from the databases [29,30,31,32]. ED = enantiomeric distribution (dextrorotatory enantiomer/levorotatory enantiomer). tr = trace (<0.05%).