Antimicrobial Activity of Essential Oils against Streptococcus mutans and their Antiproliferative Effects

Table 3

Major compounds of the selected active fractions from essential oils with their retention time (Rt), retention index (RI), and relative percentage.

Rt (min)	RI	Compound				Relative percentage^1
			Ag EO	Ag4	Bd EO	Bd2	Cs EO	Cs4	Ls EO	Ls3
4.02	899	Cyclohexanone	—	—	—	—	—	—	6.5	—
4.22	850	3-hexen-1-ol	—	—	—	0.8	3.6	5.1	—	—
5.87	977	Beta-pinene	12.0	—	—	—	—	—	—	—
7.2	1024	p-cymene	—		—	—	—	—	17.3	—
13.08	1140	Trans-pinocarveol	—	4.9	—	—	—	—	—	—
14.09	1165	Trans-pinocamphone	16.0	36.7	—	—	—	—	—	—
14.61	1177	Cis-pinocamphone	6.0	17.0	—	—		—	—	—
16.7	1274	2-decen-1-ol <E>	—	—	—	—	23.6	26.9	—	—
16.86	1277	1-decanol	—	—	—	—	33.9	35.4	—	—
17.76	1299	Trans-pinocarvyl acetate	8.2	—	—	—	—	—	—	—
19.74	1300	Thymol	—	—	—	—	—		65.8	97.8
19.95	1303	Carvacrol	—	—	—	—	—	—	—	0.6
21.84	1349	Ethyl ester benzenepropanoic	—	—	—	11.7	—	—	—	—
22.57	1416	Trans-caryophyllene	7.2	—	10.7	—	—	—	10.5	—
24.86	1473	2-dodecen-1-ol	—	—	—	—	13.1	14.5	—	—
25.04	14.78	Germacrene D	—	—	4.9	—	—	—	—	—
25.66	1493	Bicyclogermacrene	4.2	—	6.8	—	—	—	—	—
27.97	1553	M^2 = 204	6.4	—	—	—	—		—	—
30.59	1566	Trans-nerolidol	—	—	31.7	52.2	—	—	—	—
31.05	1578	Spathulenol	—	—	13.6	11.5	—	—	—	—
31.23	1582	Caryophyllene oxide	6.4	7.0	—	6.3	—	—	—	0.7
31.9	1600	Guaiol	8.5	12.7	—	—	—	—	—	—
33.44	1641	Epi alpha cadinol	—	—	—	3.1	—	—	—	—
32.47	1674	2-tetradecen-1-ol <E>	—	—	—	—	5.5	5.2	—	—
34.40	1668	Bulnesol	—	3.5	—	—	—	—	—	—

¹ The selected active fractions Ag₄, Bd₂, Cs₄, and Ls₃ had their actions against S. mutans biofilm and their antiproliferative activity evaluated. Ag EO, Bd EO, Cs EO, and Ls EO correspond to the following essential oils: Aloysia gratissima, Baccharis dracunculifolia, Coriandrum sativum, and Lippia sidoides, respectively. Only the compounds with relative percentage above 3% are listed. ²M: molecular weight of a nonidentified compound.