Table 1.
Chemical composition of the essential oil from E. ciliata.
| Number | Constituent | Retention Time/Min (Rt) | Ri * | Relative Content (%) |
|---|---|---|---|---|
| 1 | α-Pinene | 3.394 | 932 | 0.55 |
| 2 | β-Pinene | 3.812 | 977 | 0.74 |
| 3 | Myrcene | 3.861 | 988 | 1.02 |
| 4 | β-Phellandrene | 3.966 | 1019 | 0.19 |
| 5 | Limonene | 4.464 | 1040 | 22.05 |
| 6 | β-Ocimene | 4.654 | 1061 | 4.08 |
| 7 | Linalool | 5.367 | 1090 | 0.83 |
| 8 | Elsholtzia ketone | 6.726 | 1199 | 1.02 |
| 9 | Carvone | 7.366 | 1216 | 31.63 |
| 10 | Dehydroelsholtzia ketone | 8.104 | 1277 | 14.86 |
| 11 | Cubebene | 9.180 | 1344 | 1.06 |
| 12 | β-Bourbonene | 9.635 | 1379 | 0.44 |
| 13 | β-Caryophyllen | 10.077 | 1414 | 2.92 |
| 14 | α-Caryophyllene | 10.397 | 1450 | 15.47 |
| 15 | (-)-Humulene epoxide II | 10.643 | 1454 | 0.25 |
| 16 | α-Farnesene | 11.965 | 1489 | 0.47 |
| - | Total | - | - | 97.58 |
| Others | 2.42 |
* RI (retention index) as determined on a HP-5MS column using the homologous series of n-hydrocarbons.