Chemical Composition and Antibacterial Activity of the Lippia origanoides Kunth Essential Oil from the Carajás National Forest, Brazil

Table 1

Volatile constituents identified in L. origanoides Kunth essential oil.

RT	RIC	RIL	Constituents	Molecular formula	(%)
5.60	925	924	α-Thujene	C10 H16	0.49
5.84	932	932	α-Pinene	C10 H16	7.17
6.89	971	969	Sabinene	C10 H16	3.69
7.03	976	974	ß-Pinene	C10 H16	3.74
7.31	987	988	Myrcene	C10 H16	3.73
8.35	1017	1014	α-Terpinene	C10 H16	1.22
8.56	1024	1020	p-Cymene	C10 H14	8.53
8.76	1032	1026	1,8-Cineole	C10H18O	35.04
9.79	1057	1054	γ-Terpinene	C10 H16	7.16
15.23	1197	1186	α-Terpineol	C10H18O	4.36
17.20	1228	1232	Thymol, methyl ether	C11H16O	5.58
17.55	1242	1239	Carvone	C10 H14O	0.12
20.15	1298	1298	Carvacrol	C10 H14O	11.32
20.20	1321	1289	p-Cymen-7-ol	C10 H14O	0.10
22.42	1356	1349	Thymol acetate	C12H16O2	0.05
23.51	1373	1374	α-Copaene	C15H24	0.80
25.10	1413	1410	α-Cedrene	C15H24	0.07
25.38	1416	1417	(E)-Caryophyllene	C15H24	3.15
26.09	1420	1434	γ-Elemene	C15H24	0.25
26.12	1430	1432	α-trans-Bergamotene	C15H24	0.36
26.84	1452	1452	α-Humulene	C15H24	0.23
27.98	1478	1479	ar-Curcumene	C15H22	0.18
28.60	1492	1493	α-Zingiberene	C15H24	0.46
28.86	1495	1500	α-Muurolene	C15H24	0.10
29.04	1505	1505	ß-Bisabolene	C15H24	0.14
29.42	1507	1514	(Z)-γ-Bisabolene	C15H24	0.07
19.80	1515	1522	σ-Cadinene	C15H24	0.52
32.18	1578	1582	Caryophyllene oxide	C15H24O	0.24
Hydrocarbon monoterpenes					35.7
Oxygenated monoterpenes					56.5
Hydrocarbon sesquiterpenes					6.33
Oxygenated sesquiterpenes					0.24
Total					98.87

RT: retention time; RI_C: retention index (on DB-5MS column); RI_L: retention index from literature (Adams [28]).