Table 1.

Chemical composition of Cyperus articulatus rhizome essential oil (EO).

Peak Number	Compound	Retention Time (min)	RI	ProportionalArea (%)
1	α-Pinene	5.50	931	8.26 ± 0.74
2	Verbenene	6.05	967	0.44 ± 0.06
3	β-Pinene	6.73	975	4.54 ± 0.52
4	p-Cymene	8.31	1025	0.42 ± 0.05
5	Limonene	8.50	1028	0.93 ± 0.11
6	Isopinocarveol	13.1	1160	2.13 ± 0.20
7	β-Phellandren-8-ol	13.5	1163	0.32 ± 0.02
8	α-Phellandren-8-ol	14.4	1168	0.81 ± 0.10
9	Terpinen-4-ol	14.9	1174	0.22 ± 0.05
10	α-Terpineol	15.5	1190	0.63 ± 0.03
11	Myrtenol	15.8	1198	3.47 ± 0.37
12	Verbenone	16.4	1205	0.71 ± 0.08
13	α-Copaene	24.6	1375	4.83 ± 0.45
14	β-Elemene	25.5	1394	0.35 ± 0.02
15	α-Gurjunene	25.8	1409	1.55 ± 0.17
16	β-Caryophyllene	26.1	1435	1.03 ± 0.11
17	β-Copaene	27.8	1440	1.22 ± 0.12
18	Unknown	28.9	-	0.84 ± 0.05
19	Unknown	29.9	-	0.15 ± 0.01
20	Caryophyllene oxide	30.7	1550	4.82 ± 0.44
21	Unknown	31.4	-	1.51 ± 0.11
22	β-Copaen-4-α-ol	32.3	1570	4.74 ± 0.40
23	Unknown	37.7	-	0.72 ± 0.04
24	Unknown	38.3	-	1.82 ± 0.15
25	Spathulenol	39.0	1588	3.68 ± 0.38
26	Unknown	43.8	-	0.43 ± 0.05
27	Globulol	44.9	1591	2.72 ± 0.29
28	Unknown	45.1	-	0.90 ± 0.08
29	Unknown	45.5	-	0.58 ± 0.06
30	Muskatone	46.0	1681	11.60 ± 1.19
31	Cyperol	46.5	1684	1.84 ± 0.15
32	Unknown	46.9	-	0.92 ± 0.09
33	Pogostol	47.2	1687	6.36 ± 0.88
34	Unknown	47.4	-	1.60 ± 0.21
35	Unknown	47.7	-	1.02 ± 0.10
36	Unknown	48.0	-	1.30 ± 0.16
37	(E,E)-Farnesol	48.1	1740	1.43 ± 0.15
38	Cyclocolorenone	48.4	1753	10.30 ± 1.02
39	Unknown	49.3	-	0.21 ± 0.02
40	Unknown	49.5	-	0.49 ± 0.05
41	Unknown	50.2	-	0.19 ± 0.01
42	(E)-Isogeraniol	51.6	1817	0.72 ± 0.04
	Σhydrocarbon monoterpenes			14.59
	Σoxygenated monoterpenes			8.29
	Σhydrocarbon sesquiterpenes			8.98
	Σoxygenated sesquiterpenes			47.49
	Σtotal identified			80.07

RI: Retention Index.