Table 1.

Chemical compositions of Parmelia sulcata extract

Compounda	1tbR	2tbR	Areac (%)
Acetic acid	430	1.30	0.94
Methyl 2,4-dihydroxy-3,6-dimethylbenzoate	1,875	2.37	20.65
3,7,11,15-Tetramethyl-2-hexadecen-1-ol	1,965	1.4	2.54
n-Hexadecanoic acid	2,240	1.455	2.43
Decalactone	2,385	1.92	0.13
9-Octadecynoic acid	2,405	1.885	0.23
Dodecanamide	2,440	1.82	0.42
Pentadecane	2,480	1.75	0.22
9-Octadecenal	2,580	1.78	4.65
Methyl isoheptadecanoate	2,760	1.485	0.26
2-Methylnonadecane	2,765	1.485	16.18
Farnesane	2,810	1.37	1.33
2-Nonadecanone	2,815	1.61	0.24
1-Acetoxynonadecane	2,835	1.475	0.47
Eicosane	2,900	1.365	24.43
Hexyl 2-phenylethyl ester-succinic acid	2,915	1.73	0.52
1-Heneicosanol	2,925	1.515	1.00
(E,E)-3,7,11-trimethyl-2,6-dodecadien-1-ol	2,945	1.49	5.60
Ethyl icosanoate	2,995	1.5	0.86
Allyl octadecyl oxalate	3,000	1.435	0.25
1-Docosanol, acetate	3,010	1.505	1.59
Squalene	3,015	1.58	0.26
2-Hexyl-1-octanol	3,070	1.4	0.25
2-Methyloctadecane	3,075	1.46	5.28
Heneicosane	3,080	1.57	4.66
Unknown			4.63

^aAs identified by GCxGC–TOF/MS software; names according to NIST 2005 mass spectral library

^bt_R and ²t_R, retention times in the first and second dimension, respectively

^cPercentage of each component is calculated as peak area of analyte divided by peak area of total ion chromatogram times 100