Table 3. The volatile compounds of oregano seed ethanol extract analyzed by GC-MS

Volatile compounds Peak area (×106) (%)1)
1-Methyl-4-(1-methylethenyl) cyclohexene (limonene) 21.56±2.82 (24.9)
3,7-Dimethylocta-1,6-dien-3-ol (linalool) 16.5±0.14 (19.1)
1-Methyl-2-Isopropylbenzene (ο-cymene) 12.56±1.62 (14.5)
2-Isopropyl-5-methyl-phenol (thymol) 7.81±0.04 (9.0)
2,6, 6-Trimetylbicyclo[3.1.1]-2-hept-2-ene (α-pinene) 4.47±0.21 (5.2)
1-Isopropyl-4-methyl-1,4-cyclohexadiene (γ-terpinene) 4.24±0.52 (4.9)
Trans-2-methyl-2-butenal (tiglaldehyde) 3.75±0.19 (4.3)
Hexanal 3.66±0.24 (4.2)
1-Isopropyl-4-methylenbicyclo[3.1.0]hexane ((+)-sabinene) 3.57±0.11 (4.1)
5-Isopropyl-2-methlbicyclo[3.1.0]hex-2-ene((-)-α-thujene) 3.32±0.43 (3.8)
1-Phenylethanone (acetophenone) 1.75±0.09 (2.0)
7-Methyl-3-methylene-octa-1,6-diene (seocalcitol) 1.58±0.09 (1.8)
Decane 0.92±0.01 (1.0)
1-Isopropyl-4-methyl-1,3-cyclohexadiene (α-terpinene) 0.81±0.03 (0.9)
Total volatiles 86.48±5.43 (100)
1)The number in parenthesis was the percentage of each volatile divided by the total volatiles.