Table 1.

Chemical constituents and yields (in %) of EOs extracted from C. limonum, Cy. citratus, L. cubeba, and M. fragrans

EO	Compound	Content (%)	RT (min)	Retention index
C. limonum	α-phellandrene	1.54	4.59	1,001.4
	α-pinene	4.47	4.74	1,003.7
	β-pinene	19.74	5.75	1,019.5
	D-limonene	38.22	6.56	1,032.1
	1-methyl-4-(1-methylethyl)-1,4-cyclohexadiene	13.08	7.18	1,041.8
	(Z)-3,7-dimethyl-,2, 6-octadienal	2.6	10.45	1,092.9
	(E)- 3,7-dimethyl-, 2,6-octadienal	4.04	10.99	1,201.2
	Other compounds	16.31	—	—
Cy. citratus	D-limonene	5.18	13.28	1,235.0
	3,7-dimethyl-6-octenal	26.21	17.7	1,400.2
	(R)-3,7-dimethyl-,6-octen-1-ol	15.34	19.96	1,437.4
	2,6-octadien-1-ol, 3,7-dimethyl	20.42	20.94	1,453.5
	(E)-2,6-octadien-1-ol, 3,7-dimethyl-acetate	5.01	24.05	1,605.1
	(1S-cis)-2,3,5,6,8α-hexahydro-4,7-dimethyl-1-(1-methyle thyl)-naphthalene	4.28	27.6	1,670.3
	4-ethenyl-α,α,4- trimethyl-3- (1-methylethenyl)- [1R-(11α,3α,4β)]-cyclohexanemethanol	5.94	28.49	1,686.6
	Other compounds	17.62	—	—
L. cubeba	1R-α-pinene	3.04	6.5	1,031.2
	4-methylene-1-(1-methylethyl)-bicyclo[3,1,0] hexane	4.11	7.85	1,052.3
	6-methyl-5-hepten-2-one	2.88	8.4	1,060.9
	D-limonene	20.22	10.21	1,089.1
	(Z)-3,7- dimethyl-2,6-octadienal	10.57	19.79	1,434.6
	(E)-3,7-dimethyl-,2,6-octadienal	49.78	21.88	1,468.9
	Caryophyllene	3.37	26.7	1,653.8
	Other compounds	6.03	—	—
M. fragrans	benzaldehyde	0.70	5.76	1,019.6
	methyl salicylate	6.79	11.95	1,215.4
	3-phenyl-2-propenal	0.18	12.56	1,224.4
	(E)-cinnamaldehyde	79.31	14.35	1,293.1
	3-allyl-6-methoxyphenol	3.93	16.45	1,281.8
	3-phenyl-2-propenoic acid	1.08	18.68	1,416.3
	7-methyl-1-naphthol	0.37	21.36	1,460.4
	Other compounds	7.64	—	—

RT, retention time.