Chemical Composition, Antibacterial Activity, and Antibiotic Potentiation of Boswellia sacra Flueck. Oleoresin Extracts from the Dhofar Region of Oman
Table 6
GC-MS analysis of the B. sacra oleoresin extracts, putative identification, and relative abundance (%) of each compound.
Compound
Retention time (min)
Najdi oleoresin
Sahli oleoresin
Houjari oleoresin
Method 1
Method 2
Method 3
Method 1
Method 2
Method 3
Method 1
Method 2
Method 3
M
W
M
W
M
W
M
W
M
W
M
W
M
W
M
W
M
W
2,4(10)-Thujadiene
12.501
0.08
—
0.27
—
0.22
—
0.14
—
0.47
—
0.59
0.05
0.56
0.02
0.01
—
0.47
—
p-Cymene
15.26
2.55
2.13
2.71
2.47
3.46
2.42
1.12
0.95
1.48
1.27
2.17
1.89
1.87
1.54
2.26
1.98
4.2
3.76
Limonene
15.497
1.38
3.41
1.76
3.86
2.27
5.5
2.55
4.78
3.32
6.2
3.78
8.15
1.13
1.96
2.58
5.68
5.26
12.7
γ-Terpineol
15.94
0.1
—
0.28
—
0.37
—
0.46
—
1.12
—
1.67
—
0.72
—
1.21
—
1.18
—
α.-Pinene
16.436
68.6
44.6
62.7
41.7
51.7
43.8
66.5
38.3
63.1
38.8
59.2
40.3
54.7
34.2
51.6
31.4
45.7
28.6
p-Cymenene
17.454
0.32
—
0.48
—
0.4
—
0.47
—
0.96
—
0.78
—
0.25
—
0.62
—
0.33
—
Linalool
17.764
0.16
0.3
0.47
0.52
0.28
0.31
1.13
1.26
0.54
0.49
0.48
0.57
1.35
1.48
1.14
1.11
1.14
1.27
Thujone
18.368
0.21
0.37
0.52
0.72
0.83
1.05
0.27
0.38
0.78
0.92
1.16
1.27
0.44
0.57
0.26
0.33
0.81
1.07
Verbenol
18.672
0.13
0.28
0.55
0.83
0.24
0.47
1.21
1.36
0.92
1.11
0.77
0.94
2.16
2.32
1.88
2.08
1.14
1.18
(+)-Sabinol
19.132
0.53
0.76
1.1
1.35
1.31
1.88
1.24
1.43
1.75
2.16
3.69
4.88
0.12
0.17
0.86
1.14
0.16
0.36
p-Cymen-8-ol
19.433
0.06
0.18
0.11
0.23
0.08
0.14
0.09
0.15
0.52
1.03
0.43
0.74
0.46
1.11
1.32
2.28
0.71
1.46
Pinocarvone
19.885
0.21
0.31
0.32
0.18
0.27
0.34
0.17
0.28
0.34
0.26
0.33
0.35
1.3
1.88
2.42
2.62
1.28
1.48
α-Terpineol
20.002
0.09
—
1.46
0.83
1.81
1.17
0.27
—
1.38
0.92
1.47
1.05
1.16
0.71
1.95
1.26
1.78
1.03
Verbenone
20.186
0.92
0.73
0.74
0.48
0.44
0.24
0.83
0.9
1.33
1.18
0.92
0.82
2.76
2.48
3.26
2.87
2.27
1.93
Terpinen-4-ol
20.361
1.21
1.37
2.36
1.15
4.22
3.76
1.47
1.68
2.71
3.21
2.57
2.84
3.22
3.41
5.18
5.57
6.3
6.83
p-Cymen-8-ol
20.559
—
—
—
—
0.47
—
—
—
0.57
0.62
0.6
0.55
0.83
0.66
1.84
2.31
1.26
1.42
α-Terpineol
20.768
0.08
—
0.27
0.22
0.64
0.49
0.93
1.13
2.26
1.83
3.58
2.36
1.15
0.89
1.74
1.46
2.83
1.73
Sabinol
21.144
—
—
0.86
0.57
0.28
0.16
—
—
0.97
0.72
1.47
0.86
—
—
0.73
0.55
0.27
0.43
β-Elemene
21.407
0.12
0.18
3.7
5.2
6.83
8.11
0.75
1.16
4.25
4.75
7.42
8.28
1.87
2.37
4.83
5.72
4.28
5.17
Carveol
21.615
1.08
0.56
1.76
1.2
1.94
1.13
0.52
0.26
0.77
0.31
1.18
0.68
0.35
—
0.47
—
0.64
0.18
Carvacrol
22.392
—
—
—
0
0.21
0.07
0.08
—
—
—
—
—
0.22
—
0.42
0.16
0.26
0.14
(-)-Bornyl acetate
23.672
0.87
—
1.75
0.27
2.2
0.41
0.92
—
1.55
—
2.06
0.51
1.19
0.13
1.42
0.3
2.44
0.63
Thymol
24.022
0.24
0.06
0.47
0.13
0.12
0.06
0.36
0.18
0.45
0.22
0.15
0.1
0.44
0.1
1.12
0.36
0.47
0.18
Caryophyllene
28.572
0.23
—
1.36
0.14
0.37
—
0.76
0.08
1.47
0.12
1.15
0.12
0.77
0.12
1.91
0.15
1.26
0.27
Humulene
30.016
0.11
—
0.85
0.07
1.26
0.11
0.24
—
0.41
0.06
0.86
0.13
0.3
—
0.52
0.08
0.96
0.17
γ-Muurolene
30.75
0.04
—
0.06
—
0.04
—
0.03
—
0.07
—
0.07
—
0.15
—
0.22
—
0.25
—
Epicubenol
34.623
—
—
0.26
—
0.89
0.11
—
—
0.13
—
0.24
—
—
—
0.72
0.14
1.26
0.19
τ-Cadinol
34.856
0.16
—
0.14
—
0.26
—
0.18
—
0.22
—
0.25
—
0.28
—
0.16
—
0.54
0.13
The relative abundance expressed in this table is a measure of the area under the peak expressed as the % of the total area under all chromatographic peaks. Method refers to the extraction method used.
