Antifungal Activity and Composition of Essential Oils of Conyza canadensis Herbs and Roots

Table 1

Chemical composition of essential oils from herbs and roots of Coryza canadensis.

Compounds^a	% in samples			RI^b	Identification
	Herbs	Roots 1	Roots 2
2E-hexanal	0.1			873	c
α-pinene	0.3			936	c, d
Sabinene	tr			978	c, d
β-pinene	2.8	1.3		985	c, d
Myrcene	1.5			992	c
p-cymene	tr			1020	c, d
limonene	79.2	1.0		1038	c, d
trans-ocimene	0.9			1050	c
2,5-dimethyl styrene	0.1			1101	c
E,E-cosmene	0.4			1132	c
cis-verbenol	0.5			1142	c
trans-sabinol	0.4			1147	c
2-allyl-phenol	0.2			1199	c
Myrtenol	0.3			1208	c
cis-p-mentha-1(7),8-dien-2-ol	0.8			1232	c
trans-chrysanthenyl acetate	0.3			1245	c
Modheph-2-ene	0.1			1389	c
β-caryophyllene	0.2			1427	c, d
α-trans-bergamotene	2.9	tr		1439	c
α-curcumene +amorpha-4,7(11)-diene	1.8			1488	c
11-αH-himachala-1,4-diene	0.2			1495	c
4E,8Z-matricaria lactone		0.7		1490	c, d
δ-cadinene	0.2			1526
8Z-2,3-dihydromatricaria ester	1.0	3.3	2.6	1537	c
2E,8Z-matricaria ester	0.3	1.9	0.9	1540	c
2Z,8Z-matricaria ester	2.1	88.2	93.9	1551	c
4Z,8Z-matricaria lactone	tr	2.3	2.5	1560	c
Germacrene B	0.2			1567	c
2E,8E-matricaria ester	—	0.7		1597	c
Spathulenol	0.3			1581
ar-turmerone	0.1			1590	c
β-copaen-4-α-ol	0.4			1595	c
Salvia-4(14)-en-1-one	0.2			1610	c
Total	98.0	98.6	99.9

^aCompounds listed in sequence of elution from a CB-5 MS column.
^bKovats retention indices calculated against C₉ to C₂₄  n-alkanes on a CB-5 MS column.
^cComparison of mass spectra with MS libraries and retention indices.
^dComparison with authentic compound.