Table 1.

Chemical composition of Baccharis dracunculifolia aerial part essential oil during flowering period.

Peak	Compoundsa	Area (%)	RIb	Identification method
	Hydrocarbon monoterpenes	(9.58)
1	α-Pinene	1.30	932	a, b, c
2	β-Pinene	5.41	974	a, b, c
3	Limonene	2.87	1024	a, b, c
	Oxygenated monoterpenes	(0.31)
4	α-Terpineol	0.16	1186	a, b, c
5	Myrtenol	0.15	1194	a, b, c
	Hydrocarbon sesquiterpenes	(22.87)
6	δ-Elemene	0.33	1335	a, b, c
7	α-Copaene	0.29	1374	a, b, c
8	β-Bourbonene	0.07	1387	a, b, c
9	β-Elemene	0.57	1389	a, b, c
10	α-Gurjunene	0.15	1409	a, b, c
11	Trans-Caryophyllene	4.60	1417	a, b, c
12	β-Ylangene	0.42	1419	a, b, c
13	β-Copaene	0.34	1430	a, b, c
14	α-Humulene	0.84	1452	a, b, c
15	allo-Aromadendrene	1.28	1458	a, b, c
16	γ-Muurolene	0.31	1478	a, b, c
17	Germacrene D	4.49	1484	a, b, c
18	Bicyclogermacrene	4.70	1500	a, b, c
19	α-Muurolene	0.68	1500	a, b, c
20	γ-Cadinene	0.49	1513	a, b, c
21	δ-Cadinene	3.31	1522	a, b, c
	Oxygenated sesquiterpenes	(60.80)
22	Trans-Nerolidol	23.06	1564	a, b, c
23	Spathulenol	27.43	1577	a, b, c
24	Viridiflorol	2.01	1592	a. b. c
25	Epi-α-Cadinol	1.46	1638	a, b, c
26	α-Muurolol	4.08	1644	a, b, c
27	Cedren-13-ol, 8-	0.83	1688	a, b, c
28	Murolan-3,9(11)-diene-10-peroxy	1.93	1729	a, b, c
	Oxygenated diterpenes	(0.11)
29	Phytol	0.11	1942	a, b, c
	Other compounds	(6.02)
30	Heptacosane	6.02	2700	a, b, c
	Total identified	(99.69)

^aCompounds listed according to elution order from HP-5MS; ^bcalculated retention index (RI) utilizing n-alkanes c₇ to c₂₆ in capillary column (HP-5MS); ^cidentification based on the comparison of mass spectra from Wiley 275 libraries.