Table 1.

Essential oil chemical composition from aerial parts of Persicaria lapathifolia.

No	Rt a	Relative Conc. (%) b	Compound Name	Type	Identification c
					KIObserved d	KIPublished e
1	3.23	1.74 ± 0.02	α-Pinene	MH	932	935
2	4.14	1.97 ± 0.05	Sabinene	MH	969	966
3	5.43	8.04 ± 0.06	2E-Hexenoic acid	Others	1007	1009
4	13.84	3.09 ± 0.05	Limonene	MH	1024	1028
5	14.54	10.43 ± 0.14	2-Methyl butyl isovalerate	OM	1104	1104
6	18.26	1.98 ± 0.03	Hydrocinnamyl alcohol	Others	1227	1232
7	20.12	3.51 ± 0.06	γ-Nonalactone	Others	1361	1367
8	21.67	1.29 ± 0.02	trans-Caryophyllene	SH	1408	1403
9	22.64	22.61 ± 0.16	n-Dodecanal	Others	1408	1415
10	23.07	11.29 ± 0.13	α-Humulene	SH	1452	1459
11	32.46	2.69 ± 0.04	2-Ethyl chromone	Others	1614	1618
12	32.84	3.78 ± 0.04	Phytane	DH	1810	1818
13	36.88	1.75 ± 0.02	Hexahydrofarnesyl acetone	Car	1845	1847
14	38.16	3.19 ± 0.03	Carissone	OS	1927	1934
15	39.42	8.97 ± 0.08	2,4-Dimethylicosane	Others	2080	2087
16	40.02	1.08 ± 0.04	Abienol	OD	2150	2156
17	42.56	2.27 ± 0.06	n-Docosane	Others	2200	2202
18	46.02	1.18 ± 0.03	n-Tricosane	Others	2300	2300
19	46.2	2.72 ± 0.05	n-Nonacosane	Others	2900	2905
20	49.22	3.01 ± 0.04	n-Hentriacontane	Others	3100	3101
21	51.14	1.71 ± 0.03	n-Dotriacontane	Others	3200	3203
		6.80 ± 0.07	Monoterpene Hydrocarbons (MH)
		10.43 ± 0.14	Oxygenated Monoterpenes (OM)
		12.58 ± 0.12	Sesquiterpene Hydrocarbons (SH)
		3.19 ± 0.03	Oxygenated Sesquiterpenes (OS)
		3.78 ± 0.04	Diterpene Hydrocarbons (DH)
		1.08 ± 0.04	Oxygenated Diterpenes (OD)
		1.75 ± 0.02	Carotenoid derived compounds (Car)
		58.69 ± 0.13	Other compounds (Others)
		98.3	Total

^a Rt: retention time, ^b average value ± standard deviation, ^c the identification of EO constituents was based on the comparison of mass spectral data and Kovats indices (KI) with those of the NIST Mass Spectral Library (2011) and Wiley Registry of Mass Spectral Data 8th edition and literature, ^d KI_published: reported Kovats retention indices; ^e KI_Observed: experimentally calculated Kovats index relative to C₈–C₂₈ n-alkanes.