## 2 Results and Discussion
### Headspace and Volatile Oil Composition of T. atomaria
**} & \multirow{2}{*}{**Compound**} & \multirow{2}{*}{**RI**} & \multicolumn{4}{c}{**Area Percentages (\%)**} \\ \cline{4-6}  & & & **HS-SPME** & **HS-SPME** & **HD \(\pm\) SD** \\  & & & **(PDMS/DVB) \(\pm\) SD** & **(DVB/CAR/PDMS) \(\pm\) SD** & **HD \(\pm\) SD** \\ \hline
11 & \(\beta\)-Patchoulene & 1383 & 0.02 \(\pm\) 0.00 & 0.02 \(\pm\) 0.01 & - \\
12 & \(\beta\)-Bourbonene & 1387 & 0.71 \(\pm\) 0.04 & 0.63 \(\pm\) 0.02 & 0.49 \(\pm\) 0.01 \\
13 & \(\beta\)-Cubebene & 1393 & 12.80 \(\pm\) 0.53 & 10.74 \(\pm\) 0.01 & 0.61 \(\pm\) 0.25 \\
14 & \(\beta\)-Ylangene & 1421 & 0.50 \(\pm\) 0.03 & 0.61 \(\pm\) 0.04 & 0.17 \(\pm\) 0.01 \\
15 & \(\beta\)-Copane & 1432 & 0.31 \(\pm\) 0.02 & 0.45 \(\pm\) 0.03 & 0.12 \(\pm\) 0.01 \\
16 & _trans_-\(\alpha\)-Bergamotene & 1437 & - & - & 0.01 \(\pm\) 0.00 \\
17 & Aromandedrene \({}^{\rm S}\) & 1442 & 0.01 \(\pm\) 0.00 & 0.02 \(\pm\) 0.01 & - \\
18 & Isogerrenc D & 1447 & 0.10 \(\pm\) 0.02 & 0.13 \(\pm\) 0.02 & 0.03 \(\pm\) 0.01 \\
19 & Cadina-3,5-diene & 1454 & 2.45 \(\pm\) 0.07 & 3.60 \(\pm\) 0.02 & 0.39 \(\pm\) 0.02 \\
20 & (\(E\))-\(\beta\)-Farrengene \({}^{\rm S}\) & 1461 & 0.04 \(\pm\) 0.00 & - & 0.02 \(\pm\) 0.00 \\
21 & _cis_-MurouLa-4(15),5-diene & 1467 & - & - & 0.07 \(\pm\) 0.01 \\
22 & \(\alpha\)-MurouIene & 1470 & - & - & 0.01 \(\pm\) 0.00 \\
23 & Alloaromadendren \({}^{\rm S}\) & 1464 & 0.13 \(\pm\) 0.02 & 0.26 \(\pm\) 0.03 & 0.19 \(\pm\) 0.02 \\
24 & \(\gamma\)-Gurjunene \({}^{\rm S}\) & 1473 & - & - & 0.11 \(\pm\) 0.01 \\
25 & _trans_-Cadina-1(6),4-diene & 1477 & 1.21 \(\pm\) 0.02 & 2.39 \(\pm\) 0.04 & - \\
26 & \(\alpha\)-Amorphene & 1479 & - & - & 0.17 \(\pm\) 0.02 \\
27 & Germacrene D \({}^{\rm S}\) & 1486 & 32.06 \(\pm\) 2.16 & 27.89 \(\pm\) 2.00 & 22.24 \(\pm\) 1.92 \\
28 & \(\gamma\)-MurouIene & 1487 & - & - & 0.11 \(\pm\) 0.02 \\
29 & epi-Bicyclosesquiphellandrene & 1496 & 27.49 \(\pm\) 2.03 & 25.13 \(\pm\) 2.20 & 20.83 \(\pm\) 1.90 \\
30 & \(\gamma\)-Amorphene & 1495 & - & - & 2.10 \(\pm\) 0.05 \\
31 & Bicyclogermacrene & 1498 & 0.87 \(\pm\) 0.05 & 0.63 \(\pm\) 0.03 & - \\
32 & Epizonarene & 1500 & - & 0.66 \(\pm\) 0.08 & - \\
33 & \(\alpha\)-Muurolene & 1502 & 0.27 \(\pm\) 0.02 & 0.57 \(\pm\) 0.06 & 0.33 \(\pm\) 0.04 \\
34 & \(\beta\)-Cadinene & 1509 & 0.14 \(\pm\) 0.01 & 0.22 \(\pm\) 0.03 & - \\
35 & Tridecanal \({}^{\rm S}\) & 1511 & 0.05 \(\pm\) 0.01 & 0.01 \(\pm\) 0.00 & 0.08 \(\pm\) 0.01 \\
36 & \(\gamma\)-Cadinene & 1517 & 0.40 \(\pm\) 0.02 & 0.97 \(\pm\) 0.05 & 2.14 \(\pm\) 0.09 \\
37 & Cubebol & 1519 & 1.08 \(\pm\) 0.02 & 1.10 \(\pm\) 0.01 & - \\
38 & \(\delta\)-Cadinene \({}^{\rm S}\) & 1527 & 1.13 \(\pm\) 0.03 & 2.14 \(\pm\) 0.05 & 1.09 \(\pm\) 0.02 \\
39 & Zonarene & 1529 & 2.25 \(\pm\) 0.05 & 2.53 \(\pm\) 0.08 & 1.45 \(\pm\) 0.05 \\
40 & _trans_-Cadina-1,4-diene & 1536 & 0.46 \(\pm\) 0.02 & 0.83 \(\pm\) 0.04 & 0.24 \(\pm\) 0.01 \\
41 & \(\alpha\)-Cadinene & 1541 & 0.18 \(\pm\) 0.01 & 0.49 \(\pm\) 0.03 & 0.03 \(\pm\) 0.01 \\
42 & \(\alpha\)-Calacorene & 1546 & 0.01 \(\pm\) 0.00 & 0.08 \(\pm\) 0.01 & - \\
43 & Gleenol & 1590 & 9.68 \(\pm\) 0.80 & 11.02 \(\pm\) 0.70 & 15.35 \(\pm\) 0.95 \\
44 & Junenol & 1518 & - & - & 0.17 \(\pm\) 0.02 \\
45 & Di-epi-1,10-cubenol & 1629 & - & - & 0.54 \(\pm\) 0.01 \\
46 & T-Cadinol & 1646 & 0.31 \(\pm\) 0.05 & 0.39 \(\pm\) 0.04 & 1.59 \(\pm\) 0.05 \\
47 & \(\alpha\)-Muurol (Torrevol) & 1648 & - & - & 0.49 \(\pm\) 0.05 \\
48 & \(\delta\)-Cadinol & 1654 & - & - & 0.25 \(\pm\) 0.02 \\
49 & \(\alpha\)-Cadinol & 1659 & 0.03 \(\pm\) 0.00 & 0.01 \(\pm\) 0.00 & 1.45 \(\pm\) 0.09 \\
50 & Pentadecanal & 1714 & 0.03 \(\pm\) 0.00 & 0.01 \(\pm\) 0.00 & 0.16 \(\pm\) 0.01 \\
51 & 4,101(4)-Cadinaiden-8-\(\beta\)-ol \({}^{\star}\) & 1784 & 1.03 \(\pm\) 0.05 & 0.84 \(\pm\) 0.08 & 1.94 \(\pm\) 0.09 \\
52 & Disobutyl phthalate \({}^{\rm S}\) & 1870 & 0.01 \(\pm\) 0.00 & 0.0 Kundmannia sicula_ (L.) D.C. essential oil being the main compound present in the oil (81.2%) [28]. This is in agreement with the results reported by [PERSON] et al.